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Posted by Terry on June 27, 2007, 9:44 pm
On Wed, 27 Jun 2007 17:34:42 -0700, tommears@comcast.net wrote:
>I am doing a significant kitchen upgrade and the contractor has
>recommended that I upgrade the electrical service to 200amp. I've had
>3 electricians out to quote on the work---and received 3 very
>different opinions and prices. Two have told me it is not necessary
>to upgrade the main power line in the house from the meter to the load
>center. The other one says I must.
>
I agree with the 2 that say it is not necessary, unless you are
changing from a gas stove to electric or adding large appliances like
a washer/dryer. You should already have 2 20A circuits in the kitchen
now. This allows plenty of capacity for countertop appliances.
In the unlikely event that you truly do need to upgrade your service
you can always do it later. It should not affect the kitchen remodel.
BTW Having quad receptacles and under counter lights are a good thing
to add while you are at it.
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Posted by Doug Miller on June 28, 2007, 7:49 am
>On Wed, 27 Jun 2007 17:34:42 -0700, tommears@comcast.net wrote:
>
>>I am doing a significant kitchen upgrade and the contractor has
>>recommended that I upgrade the electrical service to 200amp. I've had
>>3 electricians out to quote on the work---and received 3 very
>>different opinions and prices. Two have told me it is not necessary
>>to upgrade the main power line in the house from the meter to the load
>>center. The other one says I must.
>>
>I agree with the 2 that say it is not necessary,
Bzzzzt! Wrong answer, but thanks for playing. It absolutely is. 2/0 aluminum
is rated at 150A max, per NEC Table 310.15(B)(6).
--
Regards,
Doug Miller (alphageek at milmac dot com)
It's time to throw all their damned tea in the harbor again.
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Posted by Terry on June 27, 2007, 9:59 pm
On Wed, 27 Jun 2007 17:34:42 -0700, tommears@comcast.net wrote:
>I currently have 150amp service. The meter and the load center are
>separated by about 50-feet. The wiring from the meter to the load
>center is 2/0 aluminum. I work for a major residential electrical
This should ease your mind. Unless you are using more stuff than the
average 1800 sq ft home owner 150A service is plenty. This page came
up with total load of 110A
http://hometips.com/articles/sunset_books/complete_wiring/calculate_electricalusage022.html
To understand how the formula works, consider the example of a house
with 1,800 square feet (based on outside dimensions) of finished
living space and space adaptable for future use. The house has the
usual two small-appliance circuits (3,000 watts), a laundry circuit
(1,500 watts), a hot water heater (5,500 watts), a clothes dryer
(5,600 watts), a dishwasher (1,500 watts), a garbage disposal (600
watts), a range (15,000 watts), and a central air conditioner (5,000
watts).
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Posted by on June 27, 2007, 10:39 pm
> http://hometips.com/articles/sunset_books/complete_wiring/calculate_e...
Thanks this has been helpful...
EXISTING...
3,600 sq-ft = 10,800W
range 15,000
dishwasher 1,500
fridge 1,500
disposal 600
laundry 1,500
dryer 5,500
water heater 5,600
---------------------------
40,500W
(40,500-10,000)*0.4 = 12,200 + 10,000 = 22,200 (add 2 AC = 32,200W /
240 = 134amp
NOW ADD...
2nd refrig 1,500W
2nd disposal 600
2nd oven 1,500
leave some spare capacity for eventually adding a hot tub at
& the 8" jointer I want to get for my woodworking shop (208V @ 20A)
Looks like upgrading to 200A for the new, added appliances is probably
correct.
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Posted by Terry on June 27, 2007, 10:53 pm
On Wed, 27 Jun 2007 19:39:24 -0700, tommears@comcast.net wrote:
>
>> http://hometips.com/articles/sunset_books/complete_wiring/calculate_e...
>Thanks this has been helpful...
>
>
>EXISTING...
>3,600 sq-ft = 10,800W
>range 15,000
>dishwasher 1,500
>fridge 1,500
>disposal 600
>laundry 1,500
>dryer 5,500
>water heater 5,600
>---------------------------
>40,500W
>
>(40,500-10,000)*0.4 = 12,200 + 10,000 = 22,200 (add 2 AC = 32,200W /
>240 = 134amp
>
>NOW ADD...
>2nd refrig 1,500W
>2nd disposal 600
>2nd oven 1,500
>leave some spare capacity for eventually adding a hot tub at
>& the 8" jointer I want to get for my woodworking shop (208V @ 20A)
>
>Looks like upgrading to 200A for the new, added appliances is probably
>correct.
You're welcome.
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