Upping service and adding subpanel

[pushkins]

Nope, not in any way, shape or form.

[buckofdurham]

[quote=DKAudio;26028]Ok Tom, I got another electrical job from a neighbor. Right now they have a 60A fuse box, the lines from the electric company look pretty small too. We are hoping they will handle 100A service. They are not pulling a permit or having it inspected even though I recommended it. Their electric meter is actually in the basement right next to the panel. Their weathercap and conduit are mounted under the soffit (does not go through the attic). It has a 90* bend and then runs down the exterior wall and into the basement.

This is what I am planning on doing.

Install new lines 4 AWG CU and weathercap to the line side of the meter and from the load side to the panel.

Replace their old 60A fuse box with a 100A breaker panel.

I will bond their water meter but probably won't drive a ground rod.

Install a 60A breaker sub panel in the garage. To do this I can just use a double pole 60A breaker using 6-3 with ground, correct? I know the sub panel must have an isolated neutral and ground will be bonded to the enclosure.




Code requires a ground rod at both locations. If the garage is attached.

[Speedy Petey]

Originally Posted by buckofdurham

Code requires a ground rod at both locations. If the garage is attached.

I think you mean if the garage is DEtached.

[buckofdurham]

Yes, detached.
And a 100 amp service is the minimum allowed in a single family dwelling. A panel rated for 60 amps probably won't have more then 8 spaces. You would have to use a 100 -125 amp panel and feed it with the 60. Which it should be a 100 to be code compliant.

[HayZee518]

there's something in the code book called the ten foot tap rule and the twenty five foot tap rule. has to do with taps off the main. it can be done but not recommended.
60 amp panelbox - circuits normally not over 20 spaces.

[buckofdurham]

you won't find a 60 amp panel with 20 spaces in it.

[DKAudio]

Right now they have 8 spaces, 2 for 220V central AC pullout and 6 screw type fuses.

I know 100A is now the min but again, they do not want to replace the conduit, go through the roof to raise the height, do a new meter trough, etc.

They do indeed have 1" conduit, for 100A service I need a min of 1.25". As Tom pointed out earlier only 2 #4s can go in 1".

Thanks

[HayZee518]

grade to service clearance 12 feet over residential drivways, 18 ft over roads where truck traffic is common.

[DKAudio]

This would be in their backyard. I'm 6' and can easily reach up and grab them.

[buckofdurham]

Originally Posted by DKAudio

This would be in their backyard. I'm 6' and can easily reach up and grab them.

Bottom of the drip loop has to be ten feet off the ground.