ASTM F1796-19

Standard Specification for High Voltage Detectors—Part 1 Capacitive Type to be Used for Voltages Exceeding 600 Volts AC

ABSTRACT
This specification covers portable, live-line tool-supported, direct-contact type capacitive voltage detectors to be used on electrical systems both indoors and outdoors for ac voltages. This specification establishes requirements for the design and testing of high voltage detectors, used in the electrical power industry, to determine the presence or absence of nominal operating voltage. The following tests shall be performed: voltage; low temperature impact; drop/impact; humidity; wet test; battery life test; durability of labeling; vibration resistance; continuous operation rating; response time; testing the self-test function; acceptable audible indication; acceptable visual indication; visual inspection; method to measure threshold voltage; interference voltage testing; leakage current testing; dielectric testing for detector housing; and wet testing.
SIGNIFICANCE AND USE
4.1 This specification establishes requirements for the design and testing of high voltage detectors, used in the electrical power industry, to determine the presence or absence of nominal operating voltage or the measured voltage.
SCOPE
1.1 This specification covers portable, live-line tool-supported, direct-contact type capacitive voltage detectors to be used on electrical systems both indoors and outdoors for ac voltages from 600 V to 800 kV with frequency of 50/60 Hz. The function of the voltage detector is limited to the detection of the presence or absence of nominal operating voltage.  
1.1.1 Two types of voltage detectors are provided and are designated as Type I, audible/visual and Type II, numeric, with or without audible.  
1.1.2 Two styles of voltage detectors, differing in wet conditions characteristics, are provided and are designated as Style A, indoor use and Style B indoor/outdoor use.  
1.2 The use and maintenance of these high voltage detectors and any necessary insulated tool handles are beyond the scope of this specification.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: Except where specified, all voltage defined in this specification refer to phase-to-phase voltage in a three-phase system. Voltage detectors covered by this specification may be used in other than three-phase systems, but the applicable phase-to-phase or phase-to-ground (earth) voltages shall be used to determine the operating voltage.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 14-Jun-2019
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• Technical Committee: F18 - Electrical Protective Equipment for Workers
• Drafting Committee: F18.35 - Tools & Equipment

Relations

• Replaces: ASTM F1796-09(2014) - Standard Specification for High Voltage Detectors—Part 1 Capacitive Type to be Used for Voltages Exceeding 600 Volts AC
• Effective Date: 15-Jun-2019
• Refers: ASTM F819-10 - Standard Terminology Relating to Electrical Protective Equipment for Workers
• Effective Date: 01-Apr-2010
• Refers: ASTM F819-08 - Standard Terminology Relating to Electrical Protective Equipment for Workers
• Effective Date: 15-May-2008
• Refers: ASTM F819-06 - Standard Terminology Relating to Electrical Protective Equipment for Workers
• Effective Date: 15-Nov-2006
• Refers: ASTM F819-05 - Standard Terminology Relating to Electrical Protective Equipment for Workers
• Effective Date: 01-Jan-2005
• Refers: ASTM F819-04a - Standard Terminology Relating to Electrical Protective Equipment for Workers
• Effective Date: 01-Dec-2004
• Refers: ASTM F819-04 - Standard Terminology Relating to Electrical Protective Equipment for Workers
• Effective Date: 01-Nov-2004
• Refers: ASTM F819-00e1 - Standard Terminology Relating to Electrical Protective Equipment for Workers
• Effective Date: 10-May-2000
• Referred By: ASTM F2939-13(2019)e1 - Standard Specification for High Voltage Phasing Testers
• Effective Date: 15-Jun-2019

Overview

ASTM F1796-19 is the internationally recognized standard specifying requirements for portable, live-line tool-supported, direct-contact capacitive voltage detectors for use on electrical systems with AC voltages exceeding 600 V. These high voltage detectors are essential tools in the electrical power industry, designed to determine the presence or absence of nominal operating voltage in both indoor and outdoor environments. The standard establishes design criteria, performance characteristics, and a comprehensive suite of tests to ensure the safe and dependable operation of these voltage detectors across a wide voltage range (600 V to 800 kV, 50/60 Hz).

Key Topics

• Types of Voltage Detectors:

  • Type I: Audible and/or visual indication for voltage detection
  • Type II: Numeric voltage indication, with or without audible signals

• Styles:

  • Style A: For indoor use (designed for dry conditions)
  • Style B: For both indoor and outdoor use (designed for wet conditions)

• Critical Performance Tests:

  • Voltage detection threshold and accuracy
  • Impact resistance (drop and low-temperature impact)
  • Humidity and wet testing for outdoor models
  • Battery life and continuous operation
  • Durability of labeling
  • Vibration and visual/audible indication effectiveness
  • Interference voltage and response time testing

• Operational and Environmental Ranges:

  • Defined parameters for temperature and humidity in use and storage
  • Requirements for marking voltage range, manufacturer, and use precautions

• Safety and Usability:

  • Clear audible/visual signals to indicate voltage presence
  • Self-test functions for detector verification
  • Labeling and instructions for safe usage and maintenance

Applications

ASTM F1796-19 compliant high voltage detectors are widely used in:

• Electrical Power Industry: For utility linemen, maintenance crews, and engineers to verify de-energization before performing live-line work or system maintenance on power lines, switchgear, substations, and transformers.
• Industrial Facilities and Manufacturing Plants: Detecting voltage presence on high-voltage equipment, panels, and electrical rooms, ensuring worker safety.
• Field and Outdoor Environments: Outdoor-rated (Style B) detectors perform reliably in wet or adverse weather conditions.
• Testing and Commissioning: Used during commissioning, troubleshooting, or repair to confirm safe conditions for equipment handling.

These detectors play a vital role in personal protective equipment (PPE) procedures and meet regulatory compliance for electrical safety.

Related Standards

• ASTM F819 - Terminology Relating to Electrical Protective Equipment for Workers
• ANSI C84.1 - Voltage Ratings for Electric Power Systems and Equipment

Other relevant standards may address the maintenance and use of insulated tool handles, as well as additional requirements for live-line operations.

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ASTM F1796-19 ensures high voltage capacitive detectors support electrical safety protocols by providing reliable, validated methods for voltage presence testing, suitable for environments exceeding 600 volts AC. Compliance with this standard helps organizations meet industry safety regulations, reduce risk, and enhance overall electrical safety protocols.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:F1796 −19
Standard Specification for
High Voltage Detectors—Part 1 Capacitive Type to be Used
for Voltages Exceeding 600 Volts AC
This standard is issued under the fixed designation F1796; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers portable, live-line tool-
F819Terminology Relating to Electrical Protective Equip-
supported, direct-contact type capacitive voltage detectors to
ment for Workers
be used on electrical systems both indoors and outdoors for ac
2.2 ANSI Standard:
voltages from 600 V to 800 kV with frequency of 50/60 Hz.
ANSIC84.1Voltage Ratings for Electric Power Systems
The function of the voltage detector is limited to the detection
and Equipment
of the presence or absence of nominal operating voltage.
1.1.1 Two types of voltage detectors are provided and are
3. Terminology
designatedasTypeI,audible/visualandTypeII,numeric,with
3.1 Definitions:
or without audible.
3.1.1 capacitive voltage detector—a device that relies on
1.1.2 Two styles of voltage detectors, differing in wet
current passing through stray capacitance to ground.
conditions characteristics, are provided and are designated as
3.1.2 clear indication—a specific condition that detects and
Style A, indoor use and Style B indoor/outdoor use.
indicates the voltage state at the contact electrode.
1.2 Theuseandmaintenanceofthesehighvoltagedetectors
3.1.3 clear perception—the ability by the user to determine
and any necessary insulated tool handles are beyond the scope
that the voltage detector is in its operating position.
of this specification.
3.1.4 contact electrode—the bare conductive part of the
conductiveelementthatestablishestheelectricalconnectionto
1.3 This standard does not purport to address all of the
the component to be tested.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1.5 indicator—part of the voltage detector that indicates
priate safety, health, and environmental practices and deter- thepresenceorabsenceofthenominaloperatingvoltageorthe
mine the applicability of regulatory limitations prior to use. measured voltage at the contact electrode.
3.1.6 indoor style—a detector designed for use in dry
NOTE 1—Except where specified, all voltage defined in this specifica-
conditions, normally indoors.
tion refer to phase-to-phase voltage in a three-phase system. Voltage
detectors covered by this specification may be used in other than 3.1.7 interference field—electrical field affecting the indica-
three-phasesystems,buttheapplicablephase-to-phaseorphase-to-ground
tion.
(earth) voltages shall be used to determine the operating voltage.
3.1.8 interference voltage—voltages other than the signal
1.4 This international standard was developed in accor-
voltage capable of making the device operate.
dance with internationally recognized principles on standard-
3.1.9 limit marking—distinctivelocationormarktoindicate
ization established in the Decision on Principles for the
to the user the physical limit to which the detector may be
Development of International Standards, Guides and Recom-
inserted between live components or may touch them.
mendations issued by the World Trade Organization Technical
3.1.10 nominal operating voltage—a nominal value consis-
Barriers to Trade (TBT) Committee.
tent with the latest revision of ANSI C84.1.
1 2
This specification is under the jurisdiction of ASTM Committee F18 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Electrical Protective Equipment for Workers and is the direct responsibility of contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Subcommittee F18.35 on Tools & Equipment. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved June 15, 2019. Published July 2019. Originally the ASTM website.
approvedin1997.Lastpreviouseditionapprovedin2014asF1796-09(2014).DOI: Available from American National Standards Institute, 11 West 42nd St., 13th
10.1520/F1796-19. Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1796−19
3.1.11 outdoor style—a detector designed for use either 6.1.2 Style,
indoors or outdoors. 6.1.3 Voltage range,
6.1.4 Catalog number/s.
3.1.12 responsetime—timedelaybetweensuddenchangeof
the voltage state on the contact electrode and the associated
7. Marking
clear indication.
7.1 Labeling:
3.1.13 testing element—built in or external device, by
7.1.1 Instructions for indoor and outdoor testing use and
means of which the functioning of the voltage detector can be
maintenance of the voltage detectors shall be included with
checked.
each unit. Whenever practicable, instructions for use and
3.1.14 threshold voltage—minimum voltage between the
testing shall be printed on a permanent-type label and attached
line component and earth (ground) required to give a clear
to the unit.
audible or visual indication, or both; or numeric indication,
7.1.2 Voltage range, manufacturer and a general statement
corresponding to specific conditions as defined in correspond-
regarding any use precautions or limitations shall be perma-
ing test (see clear indication and clear perception).
nently marked on each unit.
3.1.15 voltage detector—a device for indicating the pres-
8. Specifications
ence or absence of nominal design or operating voltage or the
measured voltage.
8.1 The manufacturer shall clearly specify the limits of
3.1.16 voltage, nominal design—a nominal value consistent performanceofeachvoltagedetectorwithintheinstructionsas
with the latest revision ofANSI C84.1, assigned to the circuit
follows:
or system for the purpose of conveniently designating its 8.1.1 Operating voltage range or ranges,
voltage class.
8.1.2 Operating temperature range,
8.1.3 Operating humidity range,
3.1.17 voltage range—value of voltage generally agreed
8.1.4 Storage temperature range,
uponbymanufacturerandcustomer,towhichcertainoperating
8.1.5 Storage humidity range, and
specifications are referred.
8.1.6 Any limitations in use.
3.2 Tests:
3.2.1 acceptance test— a test made at the option of the
9. Workmanship, Finish, and Appearance
purchaser.
9.1 Workmanship and finish shall be of such quality as to
3.2.2 design test—atypetestmadeonaspecimentreatedas
ensure safe operation of the unit. Appearance shall be the
representative of an industrial product. These tests will not
prerogative of the manufacturer.
generallyberepeatedinquantityproductionunlessachangein
the design is implemented.
10. Testing
3.2.3 performance test—atestperformedtoindicatenormal
10.1 General—Tests shall be performed on a detector that
operation of the instrument.
has been completely assembled. Tests shall be carried out
3.2.4 routine test—atypetestmaderegularlyonproduction
under the following ambient test conditions:
material.
10.1.1 Ambient temperature 59 to 95°F (15 to 35°C).
10.1.2 Relative humidity 45 to 75%.
4. Significance and Use
10.2 Methods—Unless otherwise specified, tests shall be
4.1 This specification establishes requirements for the de-
carried out using a 60 Hz ac power source. Tests shall be
signandtestingofhighvoltagedetectors,usedintheelectrical
performed in dry conditions.
power industry, to determine the presence or absence of
10.2.1 The maximum test voltage level shall be reached
nominal operating voltage or the measured voltage.
within 10 to 20 s.
10.2.2 An acceptable tolerance of 63% is allowed for all
5. Type of Detector
required values.
5.1 Capacitive
10.3 Design Test—At least two (2) units shall be tested to
5.1.1 Type 1 – Direct Contact—Operates without the need
ensure that design specifications are achieved.
for a ground lead, but requires physical contact with the
10.3.1 Type I Voltage Test (Audible/Visual Indication)
component to be tested; with an audible/visual indicator.
—Each unit shall be subjected to the phase to ground voltage
5.1.2 Type II – Direct Contact— Operates without the need
necessary to verify the unit’s threshold voltage(s) noting if the
for a ground lead, but requires physical contact with the
unit is designed to indicate phase to ground or phase to phase
componenttobetested;withanumericvalueindicator,withor
equivalent. The activation threshold voltage V shall meet the
without audible. t
manufacturer’s published specification 630%.
10.3.2 Type II Voltage Test (Numeric Indication)—Eachunit
6. Ordering Information
shall be subjected to the voltage necessary to verify the unit’s
6.1 Orders for high voltage detectors under this specifica-
nominal design voltage range/s, within 630 % of applied
tion shall include this ASTM designation and the following
voltage.
information:
6.1.1 Type, NOTE 2—Type II voltage detectors may indicate the design voltage in
F1796−19
phase-to-phase or phase-to-ground values.
ON and the detector shall be applied and removed five times.
Thetimesequencebetweentheseperiodsshouldvaryandeach
10.3.3 Temperature Dependence of the Indication—The de-
shall be at least 3 s long in duration. The test is considered
tector shall operate correctly in the temperature range of the
passed if all response times are shorter than 1 s.
climatic category according to Table 1. The numeric or
threshold voltage shall not vary by more than 610%, with 10.3.12 Testing the “Self-Test” Function —The self-test
respect to the numeric or threshold voltage measured when function, for detectors equipped with this feature, shall be
tested at the minimum and maximum temperature. The detec- activated according to the instructions. The visual or audible
tor shall be subjected to the maximum and minimum tempera- signals,orboth,ornumericshallactivateandshallbeobserved
ture extremes for 24 h and immediately subjected to a numeric for proper functioning. This function shall be activated three
times noting any changes observed in its operation.This test is
or threshold voltage test. The numeric or threshold voltage is
not to deviate 610% from the previously tested and recorded considered passed if the proper indications appear each time.
For the purpose of this test the numeric display shall be
test report when conducted under the standard atmospheric
conditions as stated in 10.1. considered a proper indication.
10.3.4 Low Temperature Impact—Theprocedureoutlinedin
10.3.13 Acceptable Audible Indication—
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1796 − 09 (Reapproved 2014) F1796 − 19
Standard Specification for
High Voltage Detectors—Part 1 Capacitive Type to be Used
for Voltages Exceeding 600 Volts AC
This standard is issued under the fixed designation F1796; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers portable, live-line tool-supported, direct-contact type capacitive voltage detectors to be used on
electrical systems both indoors and outdoors for ac voltages from 600 V to 800 kV with frequency of 6050/60 Hz. The function
of the voltage detector is limited to the detection of the presence or absence of nominal operating voltage.
1.1.1 Two types of voltage detectors are provided and are designated as Type I, audible/visual and Type II, numeric, with or
without audible.
1.1.2 Two styles of voltage detectors, differing in wet conditions characteristics, are provided and are designated as Style A,
indoor use and Style B indoor/outdoor use.
1.2 The use and maintenance of these high voltage detectors and any necessary insulated tool handles are beyond the scope of
this specification.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
NOTE 1—Except where specified, all voltage defined in this specification refer to phase-to-phase voltage in a three-phase system. Voltage detectors
covered by this specification may be used in other than three-phase systems, but the applicable phase-to-phase or phase-to-ground (earth) voltages shall
be used to determine the operating voltage.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
F819 Terminology Relating to Electrical Protective Equipment for Workers
2.2 ANSI Standard:
ANSI C84.1 Voltage Ratings for Electric Power Systems and Equipment
3. Terminology
3.1 Definitions:
3.1.1 capacitive voltage detector—a device that relies on current passing through stray capacitance to ground.
3.1.2 clear indication—a specific condition that detects and indicates the voltage state at the contact electrode.
3.1.3 clear perception—the ability by the user to determine that the voltage detector is in its operating position.
3.1.4 contact electrode—the bare conductive part of the conductive element that establishes the electrical connection to the
component to be tested.
This specification is under the jurisdiction of ASTM Committee F18 on Electrical Protective Equipment for Workers and is the direct responsibility of Subcommittee
F18.35 on Tools & Equipment.
Current edition approved Oct. 1, 2014June 15, 2019. Published November 2014July 2019. Originally approved in 1997. Last previous edition approved in 20092014 as
F1796-09. -09 (2014). DOI: 10.1520/F1796-09R14.10.1520/F1796-19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American National Standards Institute, 11 West 42nd St., 13th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1796 − 19
3.1.5 indicator—part of the voltage detector that indicates the presence or absence of the nominal operating voltage or the
measured voltage at the contact electrode.
3.1.6 indoor style—a detector designed for use in dry conditions, normally indoors.
3.1.7 interference field—electrical field affecting the indication.
3.1.8 interference voltage—voltages other than the signal voltage capable of making the device operate.
3.1.9 limit marking—distinctive location or mark to indicate to the user the physical limit to which the detector may be inserted
between live components or may touch them.
3.1.10 nominal operating voltage—a nominal value consistent with the latest revision of ANSI C84.1.
3.1.11 outdoor style—a detector designed for use either indoors or outdoors.
3.1.12 response time—time delay between sudden change of the voltage state on the contact electrode and the associated clear
indication.
3.1.13 testing element—built in or external device, by means of which the functioning of the voltage detector can be checked.
3.1.14 threshold voltage—minimum voltage between the line component and earth (ground) required to give a clear audible or
visual indication, or both; or numeric indication, corresponding to specific conditions as defined in corresponding test (see clear
indication and clear perception).
3.1.15 voltage detector—a device for indicating the presence or absence of nominal design or operating voltage or the measured
voltage.
3.1.16 voltage, nominal design—a nominal value consistent with the latest revision of ANSI C84.1, assigned to the circuit or
system for the purpose of conveniently designating its voltage class.
3.1.17 voltage range—value of voltage generally agreed upon by manufacturer and customer, to which certain operating
specifications are referred.
3.2 Tests:
3.2.1 acceptance test— a test made at the option of the purchaser.
3.2.2 design test— a type test made on a specimen treated as representative of an industrial product. These tests will not
generally be repeated in quantity production unless a change in the design is implemented.
3.2.3 performance test— a test performed to indicate normal operation of the instrument.
3.2.4 routine test— a type test made regularly on production material.
4. Significance and Use
4.1 This specification establishes requirements for the design and testing of high voltage detectors, used in the electrical power
industry, to determine the presence or absence of nominal operating voltage or the measured voltage.
5. Type of Detector
5.1 Capacitive
5.1.1 Type 1 – Direct Contact—Operates without the need for a ground lead, but requires physical contact with the component
to be tested; with an audible/visual indicator.
5.1.2 Type II – Direct Contact— Operates without the need for a ground lead, but requires physical contact with the component
to be tested; with a numeric value indicator, with or without audible.
6. Ordering Information
6.1 Orders for high voltage detectors under this specification shall include this ASTM designation and the following
information:
6.1.1 Type,
6.1.2 Style,
6.1.3 Voltage range,
6.1.4 Catalog number/s.
7. Marking
7.1 Labeling:
7.1.1 Instructions for indoor and outdoor testing use and maintenance of the voltage detectors shall be included with each unit.
Whenever practicable, instructions for use and testing shall be printed on a permanent-type label and attached to the unit.
7.1.2 Voltage range, manufacturer and a general statement regarding any use precautions or limitations shall be permanently
marked on each unit.
F1796 − 19
8. Specifications
8.1 The manufacturer shall clearly specify the limits of performance of each voltage detector within the instructions as follows:
8.1.1 Operating voltage range or ranges,
8.1.2 Operating temperature range,
8.1.3 Operating humidity range,
8.1.4 Storage temperature range,
8.1.5 Storage humidity range, and
8.1.6 Any limitations in use.
9. Workmanship, Finish, and Appearance
9.1 Workmanship and finish shall be of such quality as to ensure safe operation of the unit. Appearance shall be the prerogative
of the manufacturer.
10. Testing
10.1 General—Tests shall be performed on a detector that has been completely assembled. Tests shall be carried out under the
following ambient test conditions:
10.1.1 Ambient temperature 59 to 95°F (15 to 35°C).
10.1.2 Relative humidity 45 to 75 %.
10.2 Methods—Unless otherwise specified, tests shall be carried out using a 60 Hz ac power source. Tests shall be performed
in dry conditions.
10.2.1 The maximum test voltage level shall be reached within 10 to 20 s.
10.2.2 An acceptable tolerance of 63 % is allowed for all required values.
10.3 Design Test—At least two (2) units shall be tested to ensure that design specifications are achieved.
10.3.1 Type I Voltage Test (Audible/Visual Indication) —Each unit shall be subjected to the phase to ground voltage necessary
to verify the unit’s threshold voltage. The voltage(s) noting if the unit is designed to indicate phase to ground or phase to phase
equivalent. The activation threshold voltage V shall satisfy the t following relationship 610 %: meet the manufacturer’s published
t
specification 630 %.
Threshold voltage 5 0.3 to 0.45 3minimum nameplate voltage
10.3.2 Type II Voltage Test (Numeric Indication)—Each unit shall be subjected to the voltage necessary to verify the unit’s
nominal design voltage range/s, within 630 % of applied voltage.
NOTE 2—Type II voltage detectors may indicate the design voltage in phase-to-phase or phase-to-ground values.
10.3.3 Temperature Dependence of the Indication—The detector shall operate correctly in the temperature range of the climatic
category according to Table 1. The numeric or threshold voltage shall not vary by more than 610 %, with respect to the numeric
or threshold voltage measured when tested at the minimum and maximum temperature. The detector shall be subjected to the
maximum and minimum temperature extremes for 24 h and immediately subjected to a numeric or threshold voltage test. The
numeric or threshold voltage is not to deviate 610 % from the previously tested and recorded test report when conducted under
the standard atmospheric conditions as stated in 10.1.
10.3.4 Low Temperature Impact—The procedure outlined in 10.3.5 shall be followed after exposure to −20°C ⁄−4°F for 24 h.
10.3.5 Drop/Impact—The test surface shall be concrete or steel and smooth, hard and unpliable. The height of the fall shall be
3 ft. The unit shall be dropped twice: once in the horizontal position and once in the vertical. The vertical drop shall be made on
the contact electrode if present. It is acceptable if the contact electrode bends, as long as the unit continues to operate. The unit
shall be considered to have passed the test if there is no significant mechanical damage and the unit meets the requirements of 10.6.
10.3.6 Humidity—The detector is to be exposed to a minimum of 96 % humidity for 24 h. The d
...