surge arrester

He is still alive isn't he? If so, yes.

Makes no difference. And the only thing concerning here is the electrician that did it. I assume that he was still around to collect the money from you when the job was done ? :)

:Does the SDSA 1175 Surge Arrester installation require turning off all :of the power? Or, can the SDSA be installed while the power is on? :An electrician installed one on our control panel in the garage, but :power was never cut off. Just wondering if he did it right......

Since it is just a parallel connection across active and neutral it could be done without disconnecting power - provided all of the normal precautions were employed. ie. stand on rubber mat, wear rubber soled shoes, use appropriately insulated tools, handle one wire at a time and don't touch earthed objects.

I have done similar things on my own house wiring and here we use 240Vac 50Hz with phase, neutral and earth connections. I must admit that on the odd occasion I have been a bit noncahalant about things and received a nasty whack though - but I am still here.