[AT] grounds

[charlie hill]

My mothers house is wired 400 Amp also.  At the time it had an electric 
furnace that has since been replaced with a heat pump.  With the electric 
furnace 200 Amp was just enough with not much room for adding something on. 
Also, the way her house is built the meter was going to have to be right on 
the side of the house next to the front door.  By going to 400 Amp the power 
company placed the meter on the pole and uses an induction coil to read flow 
instead of the traditional type meter.  Her actual peak current use is 
probably only 100 Amps or so now.

Charlie
----- Original Message ----- 
From: "Mattias Kessén" <davidbrown950 at gmail.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Monday, December 17, 2007 5:22 AM
Subject: Re: [AT] grounds


> 400 A! My god. I knew everything is bigger in America! But... :-o That 
> can't
> be all for x-mas decoration.
>
> Mattias
>
>
> 2007/12/17, Dudley Rupert <drupert at premier1.net>:
>>
>> Warren,
>>
>> I am not suggesting at all that you doubt your' friend but I am curious 
>> as
>> to what his reasoning would be for advising you not to connect the sub
>> panel
>> in your' shop to its' own ground rod ... or at least this is what I think
>> I
>> hear you saying.
>>
>>
>> I wired the house I am living in with 400 amp service (this is more like
>> commercial than the typical residential service) and then ran 3-wire 240
>> from the house down to the barn and put a 100 amp sub panel there with 
>> the
>> ground lug connected to a ground rod (and, of course, to the neutral wire
>> from the house panel).  This was permitted/inspected but it was thirty
>> years
>> ago so maybe something has changed since then.
>>
>>
>> I did redo the main entry service to my daughter and SIL's place this 
>> past
>> summer.  The main house has the 325 amp service coming in from the
>> road.  I
>> don't know if the 325 amp service is available all across the country or
>> not
>> but for little more $$ than it costs for a 200 amp service (particularly
>> if
>> you've got dad providing the labor for coffee/sandwich/cookies) you've 
>> got
>> closer to a 400 amp service than 200.  Their guesthouse, shop and barn
>> each
>> has its' own sub panel and grounding rod and is serviced by 3-wire 240
>> from
>> the main house.  This was permitted/inspected as well but as I wasn't
>> there
>> when the inspector came I can't say for sure that he would have even
>> looked
>> at the service to/at the "out buildings" as I applied only to change the
>> main entry service.
>>
>>
>> I can think of three or four other inspected services I've done where 
>> I've
>> installed a sub panel/grounding rod (in addition to the main service) but
>> none within the past ten years so that bit of history/memory is of no
>> help.
>> My copy/edition of the NEC is thirty or more years old so it's of no help
>> either.  In conclusion I guess I've just been trying to give a bit of my
>> thinking as to why I am wondering at what your' friend told you regarding
>> not installing the ground rod at your' shop but I am most likely the one
>> that's got some new learning to do.
>>
>> Dudley
>> Snohomish, Washington
>>
>> -----Original Message-----
>> From: at-bounces at lists.antique-tractor.com
>> [mailto:at-bounces at lists.antique-tractor.com]On Behalf Of Mogrits
>> Sent: Sunday, December 16, 2007 10:24 PM
>> To: Antique tractor email discussion group
>> Subject: [AT] grounds
>>
>> This is all anecdotal but nevertheless:
>>
>> I have a 10kw briggs powered generator with a grounding lug on the
>> generator
>> housing. When I use the genset to power the house I connect the
>> houseground
>> to the generator by a copper wire I leave connected and coiled up just
>> below
>> the house service.
>>
>> When I built my shop a few hundred feet from the house and wanted to 
>> power
>> it from the house service instead of a separate meter I asked my
>> electrical
>> engineer friend about installing a ground rod and he advised me to NOT
>> separately ground the building. He says the ground should come from the
>> same
>> source as the power, so I ran four-wire mobilehome service cable up to 
>> the
>> shop.
>>
>> Warren
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>> 12/14/2007
>> 11:29 AM
>>
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