O&M Manual –90E1720004
Section 5 Installation Page 22 of 52
Check the Equipment Ground-Fault Systems
Paragraph 230-95(c) of the National Electrical Code requires that all equipment ground-fault
protection systems be tested when first installed.
Record results on the ground fault system test log.
Note: If a complete check of the ground-fault system is necessary, use primary injection testing.
If the system is multiple source and/or requires field connections at the job site, use primary
injection testing.
Note: Some ground fault systems require field connections at the job site. Consult the
switchgear interconnection wiring drawing for details.
Conduct the Electrical Insulation Resistance Test
Russelectric bypass-/isolation transfer switches are factory tested for dielectric insulation
strength.
Conduct dielectric testing once the switch is installed. This testing will help identify short-
circuits and undesirable grounds in the switch and help identify any potential damage to the
insulation during transport and installation.
1. Refer to ANSI/IEEE C37.20.1 for information regarding field dielectric testing.
2. Disconnect the RPTCS controller plugs. If supplied, open all control power and
metering disconnects, or remove the fuses from the control circuits.
3. (If supplied) Isolate all supply voltage to solid-state controls on closed transition
switches.
4. Isolate any and all control power equipment for metering or annunciation
accessories.
5. Consult factory concerning how to handle other, special wiring conditions
6. With the neutral isolated from the ground and the power switches and circuit
breakers open, conduct electrical insulation tests from phase-to-phase, phase-to-
ground, phase to-neutral, and neutral-to-ground.
Note: If the resistance reads less than one megohm while testing with the branch circuit devices
in the Open position, the system may be unsafe and should be investigated. Consult Russelectric
Services at 1-800-654-3020 to help you correct any problems.
7. After completing the electrical insulation test, replace all control power fuses that
may have been removed and close power disconnects that have been opened.
Energize supplies as desired.
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