Even if nothing is plugged in for normal use it is a good safe place to test earthing is present, L-N polarity is correct and a quick read of an upper limit for Zdb and a lower limit for PSSC for those situations that is required With the main switch off using a bit of cunning you can also do a whole site IR from there as well. Many countries recommend at least a single socket as part of the CU assembly for just this reason, along side an accessible earth terminal for wander lead R2 tests - saves having to do the equivalent of opening up the Henley blocks. (and means you can plug in your clip lamp, drill, radio whatever, without trailing leads.)
Even if nothing is plugged in for normal use it is a good safe place to test earthing is present, L-N polarity is correct and a quick read of an upper limit for Zdb and a lower limit for PSSC for those situations that is required With the main switch off using a bit of cunning you can also do a whole site IR from there as well. Many countries recommend at least a single socket as part of the CU assembly for just this reason, along side an accessible earth terminal for wander lead R2 tests - saves having to do the equivalent of opening up the Henley blocks. (and means you can plug in your clip lamp, drill, radio whatever, without trailing leads.)
