GS38
The HSE's guidance note on electrical test equipment used by electricians. It describes what safe indicators, probes and leads look like: fused or -limited leads, finger barriers, minimal exposed probe metal, and a proving unit to verify the indicator before and after use. 'GS38-compliant' is shorthand for test kit you can trust your life to.
Where GS38 fits in the learning path
The Sparks Basics section covers these units:
- Working Safely
Curriculum mapping: C&G 2365 Unit 201.
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- Safe Isolation ProcedureSparks Basics
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- Safe Isolation — quiz previewFree · Sparks Basics
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The procedure that proves a circuit dead before anyone works on it. Prove the voltage indicator against a known source, isolate the circuit, secure the isolation with your own lock and tag, prove the point of work dead across all conductor combinations, then prove the indicator again. The final step is the one that catches a tester that died mid-job.
Safe isolation
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Safe isolation
The procedure that proves a circuit dead before anyone works on it. Prove the voltage indicator against a known source, isolate the circuit, secure the isolation with your own lock and tag, prove the point of work dead across all conductor combinations, then prove the indicator again. The final step is the one that catches a tester that died mid-job.
Read the Safe isolation entryContinuity testing
Low-resistance measurement proving that conductors which must be complete actually are. That means protective conductors back to the earthing terminal, bonding conductors to services, and the legs of ring final circuits. Performed dead with a low-ohm meter, it is the first step of the test sequence because everything after it assumes the earth path exists.
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