ASTM F712-06(2018)
(Specification)Standard Test Methods and Specifications for Electrically Insulating Plastic Guard Equipment for Protection of Workers
Standard Test Methods and Specifications for Electrically Insulating Plastic Guard Equipment for Protection of Workers
SIGNIFICANCE AND USE
4.1 All three tests may be used for product design qualification.
4.2 This specification covers the minimum electrical, chemical, and physical properties designated by the manufacturer and the detailed procedures by which such properties are to be determined. The purchaser has the option to perform or have performed any of these tests and may reject equipment that fails to meet the standard criteria. Claims concerning failure to meet the specification are subject to verification by the manufacturer.
4.3 Plastic guard equipment is used for protection against accidental brush contact by the worker. A margin of safety shall be provided between the maximum voltage at which they are used and the proof-test voltage at which they are tested. This relationship is shown in Table 1 and Table 2. The equipment is designed only for phase-to-ground or covered phase-to-covered-phase exposure.
Note 1: Rubber insulating equipment is realistically limited to Class 4 material in the design specification standards. Plastic guard equipment has been designed to go beyond these voltages and provide a satisfactory degree of worker protection. Major differences exist in use criteria between the rubber and the plastic guard equipment. Each glove, sleeve, or other article of rubber insulating equipment has a given safety factor for the phase to phase voltage on which it may be used and the class or proof voltage at which it is tested. Plastic guard equipment, however, is designed to provide a satisfactory safety factor only when used in a phase-to-ground exposure. If exposure is phase-to-phase, then a satisfactory safety factor is only provided if the exposure is covered-phase-to-covered-phase.
4.4 Work practices vary from user to user, dependent upon many factors. These may include, but are not limited to, operating system voltages, construction design, work procedure techniques, weather conditions, etc. Therefore, except for the restrictions set forth in this specification becaus...
SCOPE
1.1 These test methods cover three electrical tests on plastic guards and assembled guard systems. They are:
1.1.1 Method A—Withstand voltage proof test,
1.1.2 Method B—Flashover voltage, and
1.1.3 Method C—Leakage current.
1.1.4 This specification covers plastic guard equipment and guard systems used by workers for temporary insulation on electric power circuits.
1.1.5 Plastic guard equipment covered by this specification is rated for momentary, or brush contact only. Maximum-use voltages are covered in Table 1 and Table 2. (A) Cover-up materials are tested at values greater than the maximum use phase to ground values. The maximum use phase to phase values relate to guarded phase to guarded phase. The units are not rated for bare phase to guarded phase potentials. (A) Cover-up materials are tested at values greater than the maximum use phase to ground values. The maximum use phase to phase values relate to guarded phase to guarded phase. The units are not rated for bare phase to guarded phase potentials.
1.2 These test methods cover, but are not limited to, the following typical guards:
1.2.1 Conductor Guards and Connecting Covers as follows:
1.2.1.1 Line guards,
1.2.1.2 Line guard connectors,
1.2.1.3 Insulator covers,
1.2.1.4 Dead-end covers,
1.2.1.5 Bus guards, and
1.2.1.6 Bus “T” guards.
1.2.2 Structure and Apparatus Covers as follows:
1.2.2.1 Pole guards,
1.2.2.2 Ridge pin covers,
1.2.2.3 Switch blade covers,
1.2.2.4 Arm guards,
1.2.2.5 Cutout covers,
1.2.2.6 Structural barriers, and
1.2.2.7 Cross arm guard.
1.3 It is common practice for the user of this equipment to prepare instructions for the correct use and maintenance.
1.4 The use and maintenance of this equipment is beyond the scope of these test methods.
1.5 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 o...
General Information
Relations
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:F712 −06 (Reapproved 2018)
Standard Test Methods and Specifications for
Electrically Insulating Plastic Guard Equipment for
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Protection of Workers
ThisstandardisissuedunderthefixeddesignationF712;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
1.1 Thesetestmethodscoverthreeelectricaltestsonplastic
mine the applicability of regulatory limitations prior to use.
guards and assembled guard systems. They are:
1.6 The values stated in inch-pound units are to be regarded
1.1.1 Method A—Withstand voltage proof test,
as standard. The values given in parentheses are mathematical
1.1.2 Method B—Flashover voltage, and
conversions to SI units that are provided for information only
1.1.3 Method C—Leakage current.
and are not considered standard.
1.1.4 This specification covers plastic guard equipment and
1.7 This international standard was developed in accor-
guard systems used by workers for temporary insulation on
dance with internationally recognized principles on standard-
electric power circuits.
ization established in the Decision on Principles for the
1.1.5 Plastic guard equipment covered by this specification
Development of International Standards, Guides and Recom-
is rated for momentary, or brush contact only. Maximum-use
mendations issued by the World Trade Organization Technical
voltages are covered in Table 1 and Table 2.
Barriers to Trade (TBT) Committee.
1.2 These test methods cover, but are not limited to, the
following typical guards:
2. Referenced Documents
1.2.1 Conductor Guards and Connecting Covers as follows:
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2.1 ASTM Standards:
1.2.1.1 Line guards,
D149Test Method for Dielectric Breakdown Voltage and
1.2.1.2 Line guard connectors,
DielectricStrengthofSolidElectricalInsulatingMaterials
1.2.1.3 Insulator covers,
at Commercial Power Frequencies
1.2.1.4 Dead-end covers,
D256Test Methods for Determining the Izod Pendulum
1.2.1.5 Bus guards, and
1.2.1.6 Bus “T” guards. Impact Resistance of Plastics
D570Test Method for Water Absorption of Plastics
1.2.2 Structure and Apparatus Covers as follows:
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1.2.2.1 Pole guards,
2.2 IEEE Standard:
1.2.2.2 Ridge pin covers,
IEEE 978Guide for In-Service Maintenance and Electrical
1.2.2.3 Switch blade covers,
Testing for Live-Line Tools
1.2.2.4 Arm guards,
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2.3 ANSI Standard:
1.2.2.5 Cutout covers,
C39.5Safety Requirements for Electrical and Electronic
1.2.2.6 Structural barriers, and
Measuring and Controlling Instrumentation
1.2.2.7 Cross arm guard.
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2.4 UL Standard:
1.3 It is common practice for the user of this equipment to
94Tests for Flammability of Plastic Materials for Parts in
prepare instructions for the correct use and maintenance.
Devices and Appliances
1.4 The use and maintenance of this equipment is beyond
the scope of these test methods.
1.5 This standard does not purport to address all of the 2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
safety concerns, if any, associated with its use. It is the contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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These test methods are under the jurisdiction of ASTM Committee F18 on Available from Institute of Electrical and Electronics Engineers, Inc. (IEEE),
Electrical Protective Equipment for Workers and are the direct responsibility of 445 Hoes Ln., P.O. Box 1331, Piscataway, NJ 08854-1331, http://www.ieee.org.
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Subcommittee F18.25 on Insulating Cover-Up Equipment. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
Current edition approved April 15, 2018. Published April 2018. Originally 4th Floor, New York, NY 10036, http://www.ansi.org.
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approved in 1981. Last previous edition approved in 2011 as F712–06 (2011). Available from Underwriters Laboratories (UL), 333 Pfingsten Rd.,
DOI: 10.1520/F0712-06R18. Northbrook, IL 60062-2096, http://www.ul.com.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F712−06 (2018)
A
TABLE 1 Withstand Voltage Proof Test NOTE1—RubberinsulatingequipmentisrealisticallylimitedtoClass4
materialinthedesignspecificationstandards.Plasticguardequipmenthas
Class Rating, Max Use Proof Test Withstand Voltage
been designed
...
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