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200A GFI Main #54877 08/09/05 12:36 PM
Joined: Aug 2005
Posts: 49
F
foestauf Offline OP
Member
I'm surprised they haven't started to call for the entire house to be GFI protected. Wounder when they are going to just start cranking out 150/200A GFI mains:-)

Work Gear for Electricians and the Trades
Re: 200A GFI Main #54878 08/09/05 01:08 PM
Joined: Jul 2002
Posts: 717
M
macmikeman Offline
Member
If the trip threshold were still 5 milliamps then it would be awful easy to trip out all the power for the building and leave the occupants scrambling for a light source to see their way out to the main source to reset it. Seems like a bad idea to me.

Re: 200A GFI Main #54879 08/09/05 04:35 PM
Joined: Aug 2005
Posts: 49
F
foestauf Offline OP
Member
Emergency lighting could be required:-)

Re: 200A GFI Main #54880 08/09/05 05:13 PM
Joined: Oct 2004
Posts: 803
mxslick Offline
Member
Imagine the lady of the house's reaction to the battery pack emergency floods in every room... [Linked Image]


Stupid should be painful.
Re: 200A GFI Main #54881 08/09/05 05:25 PM
Joined: Mar 2005
Posts: 1,803
Alan Belson Offline
Member
Yes. "I want a green one to match my curtains."
Alan


Wood work but can't!
Re: 200A GFI Main #54882 08/09/05 05:25 PM
Joined: Nov 2002
Posts: 789
W
wa2ise Offline
Member
You wouldn't want to kill the entire house. Things like freezers, fridges, and heating systems can cause serious problems if they go dead for too long (Say the owner is out of town for a week...).

Re: 200A GFI Main #54883 08/09/05 06:50 PM
Joined: Jan 2003
Posts: 4,391
I
iwire Offline
Moderator
First I have to ask why would it be bad to have GFCIs in more locations?

I doubt that we will see a 200 amp GFCI main with 5 ma trip.

I believe many European homes are required to have a type of GFCI main but the trip level is higher than 5 ma.

Services and feeders larger than 1,000 amps and 150 volts to ground are required by the NEC to have ground fault protection however the trip level is often a few hundred amps or more. These GFP systems do not protect personal like GFCIs do.


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: 200A GFI Main #54884 08/09/05 06:56 PM
Joined: Mar 2005
Posts: 1,803
Alan Belson Offline
Member
Exactemunto! So why have my poco, EDF, fitted a 500ma one at my entry? The bloody stupid useless thing pops off at the slightest sniff of a thunderstorm within 100 miles, and it's a manual reset. We have to go round the house resetting the fax, the timers, vieo, clocks etc.. We can't rely on the heating for frost protection in winter if we go to the UK, so have to drain down the domestic, and the heating system is 50% antifreeze filled for protection. All the distribution network here is overhead, ( except for the latest stuff going underground, prompted by a tempest in 2000 which blew so many poles over they had to import English linesmen to get the work done. Some poor sods were off power for two months!)
When I asked the Poco if there was an auto-reset type, all I got was a gallic shrug, eyes rolled up and that peculiar " Les Anglais!" look. Does an auto-reset type even exist?

ranto finito!
Alan


Wood work but can't!
Re: 200A GFI Main #54885 08/09/05 09:37 PM
Joined: Jul 2004
Posts: 9,513
G
gfretwell Offline
Member
Real life experience ... I have all of the exterior lighting around my screen cage on a single GFCI circuit. It trips a lot and I never find a single box or fitting that is leaking enough to show up on a meter but the combined leakage from all of them trips the GFCI. I still like the idea of GFCI enough to keep it but I may split up the circuit

I can't imagine the combined leakage of a whole service being under 5ma or even 30ma.


Greg Fretwell
Re: 200A GFI Main #54886 08/10/05 02:13 PM
Joined: Jul 2004
Posts: 145
C
chipmunk Offline
Member
As Alan said, that is a MAJOR problem this side of the great pond, our GFCIs are rated 30mA or 100mA, but Alan's 500mA trips on thunderstorms, as do ours. It's so bad that the current wiring regulations here (our version of the NEC) highly recommend *NOT* using one for the main.

A time delayed type might be less prone to nuisance tripping, but individual circuit protection is IMHO far less inconvenient, it also gives you a fighting chance of finding out where a ground fault is without having to dismember the panel.


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