No problem at my house, the service entrance is underground. Comes into the basement immediately into the meter, and about 6 inches below the meter can is the service equipment. A pair of 100 amp fuses. Then that feeds a heavy BX style 3 wire #2 AWG cable that runs to a panel in the middle of the house.
Even though it's a subpanel, the ground bond screw connects the neutral to the grounding. I would guess that the BX shield would not take a 100 amp fault current, and would burn the house if it did. House was built in the 1950's.
Re: A safety message by a Utility in nthe MidWest#88445 06/03/0410:40 AM06/03/0410:40 AM
The story about the painter falling off the ladder is on a video purchased from Dupont in Virginia, I will see if I can do a short clip on my digital camera so it can be posted for you.
The name of the video is: "Take Electricity Seriously" and it is probably one of the best because they are not actors!
The stories are all true, and show how a person was electrocuted in his flooded basement, the guy touching the electrical vacuum cleaner while cleaning his car ... this video also shows a medic who made contact with HV lines.
"the ground bond screw connects the neutral to the grounding"
Not good and you will hear from others here too, maybe they can add to this or you can see the commentary in the NECH in 408.20 and 21??
Joe Tedesco, NEC Consultant
Re: A safety message by a Utility in nthe MidWest#88447 06/03/0404:40 PM06/03/0404:40 PM
Joe, there was a roofer killed in Asheville five or six years ago when he came into contact with a service drop.
This was a commercial building and I don't recall the details so I can't remember the voltage, but in any case this warning would have saved him if he would have adhered to it.
Wa2ise, I would separate these conductors, and even though there may be some who would say the Armour may not clear a fault of 100 amps, (put a megger at 500 or 1000v between the points for a test) I would feel better about this than the possibility of the Armour carrying the neutral load.
Personally, I'd try to run an external EGC between the panels. (yea, yea, yea, I know
[This message has been edited by Roger (edited 06-03-2004).]
Re: A safety message by a Utility in nthe MidWest#88448 06/06/0408:52 PM06/06/0408:52 PM