In response to the OP, does not even take water on the floor of your garage, even just bare damp concrete is enough of a conductor to be of concern...
Individual GFCIs are not in total much more expensive than the expensive breaker/GFCI unit. So the cost penalty is small, unless you have an awful lot of outlets on the circuit.
Keep eye on ball.
My new shop has a GFCI breaker for the ground floor 120V outlets. The 230V outlets don't need protection (per the regs) even if the risk seems at least the same as the 120v outlets. The 2nd story has a wooden floor and does not need GFCI, nor did the lights. I did run everything in conduit (EMT).
Don't try to run any 120v vfd on a gfci... they won't.
Most all my cords are 10 ga with GFIs which add protection. I wouldn't do Main or any GFI breakers. Why don't 240v use GFIs? Because they don't have a ground & neutral?
You can lead people to knowledge but you can't make them think.
"Lead, follow, or get out of the way."-Thomas Paine
Q's for those here that I see are more familiar with NEC than I am.
My workshop here in Michigan is a room off the detached garage, built ( with 120V electricity) in 1951.
I have replaced the outlets with the polarized type, and checked the grounds.
I have added an isolator/ 10 Amp TD fuse unit to the outlets for lathe, table saw etc.
It does not presently have GFCI.
It is supplied via underground cable from a 20 Amp 10 KA 1 pole circuit breaker in the Couse Hinds panel in the house.
>>> Does this detached room with original wiring as updated, need GFCI to comply with NEC?
My electronics bench is in the basement and is powered with 120 V
presently from an outlet connected to the original K&T ( knob and tube wiring screwed to the house wooden frame)
from 1926, no proper ground.
I have vintage test gear and i like to play around with small electronics, and also power electronics.
To make all this safer just for me in my retirement,... and I am not really looking to GFCI for this,
I am thinking to purchase for my bench outlets, a Hammond 171F.
This is a 115:115V 500 VA isolation transformer with tail plug and receptacle. (C UL & UL listed (File #E211544))
I would like to get an electrician in to install this properly, fed from the panel, to power an outlet strip above the workbench.
>>>> Will the electrician be able to install this in compliance with the NEC?
Last edited by lakeside53; 03-20-2017 at 08:53 PM.
Yes, any competent electrician can install this" to code". Remember.. to comply with NEC code you to have to have an inspection, so the AHJ (inspector) has the last word. None of this is difficult.
Last edited by lakeside53; 03-20-2017 at 08:54 PM.