EDU Electrician/Home Improvement Crew v. Sub Panel

Ramathorn15

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Jan 31, 2008
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So I'm wanting to do a 220v 100a sub in my garage. Here in NM (and a lot of the SW I hear) they had horrible construction. My main is on the very back wall of my house, pretty much the furthest point from the garage.

I need the sub to run my new compressor, cnc plasma, and welder. Only two things will ever run at once (compressor and plasma) so I think 100a will be more than enough.

Plan is to run 3x #2 thhn and 1x #8 thhn in 1.25" EMT. I don't have a bender, so I'll probably have to use slip couplings with pre 90° pieces but mostly the junction box 90° things.

Another shitty thing is my house doesn't have a flat wall. I have something like 16 90° I have to make just to go from the back wall, to the side wall, then into the garage.


Here's the fucking annoying path. There's already 1" conduit halfway there for a hot tub pad that we're eventually abandoning. So I'll tear down the 1" and try to follow the same path with the 1.25"

Main panel going straight up to the overhang
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Above the window

JfOlVM0muA_-UoMspLGIrVyDEzye8SlJ4qsHaQ2xEzYIiiLY-gJudpppAwantJOTQGnAbXrZDpwPpJ4Rc0b-qCkTcaf5NG_F55JXH4SE8eAGfLO1RrFLrh3zLNcURH1FT9S-XI7o5lA=s0


Around the corner then over the patio awning

GX7hrfXQvQMAIJTDGDE0fk31Je9JwzNHpM1vUd9RJ0zEQg8Nntyyxyg4SdVtReP7dQ7KeRqi_ztzIWICiDD0uS0gLhqDyk6Tr6hSM5b-s6FvpoFE9KCyHl4_eEkjLZ7AN3Ylz5A9UTs=s0



Then I plan deviate from the 1" and stay high around the corner and the fireplace kickout. Then down and into the side of the garage.

K4ik5VUCDGON1JIMUcyMMZkrrQdnzylrdi8fUfFJbsrMYJrkrunl5AQzOcsPTcJVcTdMPlGD6KWdhaJco1nnWfDAnd0rcb3ji9NnJcUEuGg7FTFAnj7YiNKf_l1cwFN_Dm8GmxslMbo=s0


2WD4RVIQA8PyhZ3WnDQZoL7Upa6pV0A3M0pRadHIEWv4dcXR8xb5a6dKoU19jU_pl_OhT1pgCsbDZz9Xoxa_mqG18vfDnblHEerrg2A08xz_gauz4NpEpWkpzpzqM3NIT3ezxKUCdDA=s0


Over/under my house burns down in a couple weeks?
 

whatever

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Feb 18, 2004
214,016
90a is more ideal. you can use mobile home feeder at a far far far less cost per foot.



personally running conduit low looks a lot cleaner. but you do you.
 
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whatever

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Feb 18, 2004
214,016
Copper:
3 runs of #1THWN at 1.35 a foot is 4.05 per fot.
1 run #6 is 50c a foot.

total cost 4.55 a foot for 100a service.


AL:
Mobile home feeder: 2-2-2-4 is 1.17$ a foot for 90a service.
 
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Ramathorn15

Ramathorn15

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Jan 31, 2008
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90a is more ideal. you can use mobile home feeder at a far far far less cost per foot.



personally running conduit low looks a lot cleaner. but you do you.

Hmm. Didn't consider running it low. It would still have to go over the patio awning as there is a door there. But I could do the rest low I think. Going to look into mobile home feeder.
 

whatever

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Feb 18, 2004
214,016
Hmm. Didn't consider running it low. It would still have to go over the patio awning as there is a door there. But I could do the rest low I think. Going to look into mobile home feeder.

is the door flush with the ground? I have conduit under my back garage door. works fine but i have a 4" threshold to keep water out.
 
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Ramathorn15

Ramathorn15

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Jan 31, 2008
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Copper:
3 runs of #1THWN at 1.35 a foot is 4.05 per fot.
1 run #6 is 50c a foot.

total cost 4.55 a foot for 100a service.


AL:
Mobile home feeder: 2-2-2-4 is 1.17$ a foot for 90a service.

Cost I found was #2 copper $1.10 x3 = 3.30+ #8 copper $.35= $3.65/ft
 
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Ramathorn15

Ramathorn15

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Jan 31, 2008
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I'm honestly more worried about conduit. I've done plenty of wiring, but I've never done conduit or even anchored into stucco. I know I need to deburr and not allow more than 360° without a pull box, but Ill probably have a pull at every 90 since they will be going tightly around corners.
 
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Ramathorn15

Ramathorn15

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Jan 31, 2008
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for a short run like that go for it. copper is tried and true. and easy. nolox not needed.

dont forget to leave space for my referral

I originally was thinking this wouldn't really add any value to the house, but the thread about quebec banning new ICE got me thinking it will.
 

whatever

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Feb 18, 2004
214,016
I'm honestly more worried about conduit. I've done plenty of wiring, but I've never done conduit or even anchored into stucco. I know I need to deburr and not allow more than 360° without a pull box, but Ill probably have a pull at every 90 since they will be going tightly around corners.
LB around the corners will naturally make it so you're never more than 360.
inside corner can get a 90 and look fine.

use a level and make it look right to the eye.

stucco anchors at depot are fine. 3/16 by 1.5"
 

whatever

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Feb 18, 2004
214,016
I originally was thinking this wouldn't really add any value to the house, but the thread about quebec banning new ICE got me thinking it will.

if you think you will go electric in the near term i'd honestly just pull a separate 50a run for the car in that conduit.
 
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Ramathorn15

Ramathorn15

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Jan 31, 2008
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LB around the corners will naturally make it so you're never more than 360.
inside corner can get a 90 and look fine.

use a level and make it look right to the eye.

stucco anchors at depot are fine. 3/16 by 1.5"

Didn't even know they made stucco anchors lol. I'm still wrapping my head around how they build houses here. So different than what I was accustomed to in WV.
 
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Ramathorn15

Ramathorn15

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Jan 31, 2008
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if you think you will go electric in the near term i'd honestly just pull a separate 50a run for the car in that conduit.

I probably won't. And if I do later on, hopefully my workshop will be in a separate future garage out back by then. Can't park a car in the main garage due to fab equipment.
 

whatever

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Feb 18, 2004
214,016
I probably won't. And if I do later on, hopefully my workshop will be in a separate future garage out back by then. Can't park a car in the main garage due to fab equipment.

driveway right there? very popular to hang the charger outside for driveway charging.

at the end of the day 100a in a garage is PLENTY. you can manage between fab and charging if it comes to it. i only have 70a and manage fine with air compressor and welder and tesla and pool on the sub
 
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Ramathorn15

Ramathorn15

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Jan 31, 2008
7,894
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driveway right there? very popular to hang the charger outside for driveway charging.

at the end of the day 100a in a garage is PLENTY. you can manage between fab and charging if it comes to it. i only have 70a and manage fine with air compressor and welder and tesla and pool on the sub

The panel would be in the front of the garage. I plan to run a couple outlet inside the garage to the door though.
 
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