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Topic: Page Two
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Mike Torres
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Sep 2017
Mike Torres (San Antonio, Texas, US) says...

I'm building a new shop in my back yard, 30x20 two story. Downstairs will be my wood shop nothing fancy, upstairs will be my man cave entertainment system i.e. Tv cable small frig"

Not sure if I'm going to have a window unit or install a Mitsubishi wall hangar..

I'm going to run 0/3 wire from the house panel to the shop. What size electric panel should I use.. And is the 0/3 over kill?

Any help is appreciated.

Mike

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Ryan
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Dec 2016
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Ryan says...

Hi Mike,

With limited details on your building, I'll give you a general idea of what you may need. Of course, you can always use my service size calculator at http://wireyourownhouse.com/tools/housecalc.html.

In a residential wood shop I guess we would assume no really large tools and you're only using one at a time. With this assumption and your upstairs needing minimal power you could probably squeak by with a 30 amp feed, but I would recommend no smaller than a 60 amp for a place like yours.

If you put a 60 amp breaker in your house panel, that becomes your overcurrent protection and the panel in your shop is just a main disconnect and protection for your circuits. With that in mind, you would need at least a 60 amp panel (or larger) with enough circuit spaces for what you want to have.

If you are speaking copper, 3/0 is good for 200 amps, so way overkill. For 60 amps you would only need #6 copper or #4 aluminum.

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Jim Schmidt
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Sep 2017
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Jim Schmidt (Roseburg, Oregon, US) says...

connecting exterior surface mounted meter base/disconnect to load center via SER cable through back of meter base. How do I connect cable to meter base through wall? Just cut larger hole in wall board to accommodate standard cable clamp or is there a better alternative?

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Ryan
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Dec 2016
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Ryan says...

Hi Jim,

If the wall is open,the best way is to just cut a larger hole in the sheathing and use a regular cable clamp for the cable. If you are going all the way through a wall that is finished on the inside with sheetrock already, you could use PVC to sleeve the cable through the wall, with the appropriate fittings. Either way, remember to caulk around your meter base on the outside to prevent leaking into your wall.

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Jim Schmidt
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Sep 2017
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Jim Schmidt (Roseburg, Oregon, US) says...

Thanks Ryan. Will do.

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Jim Schmidt
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Sep 2017
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Jim Schmidt (Roseburg, Oregon, US) says...

Installing Meter base/disconnect on exterior wall, connecting to load center with 4/0,4/0,4/0,2/0 SER cable.

1/2 inch plywood wall. How do I connect cable to meter box? Just cut extra large hole to accommodate a standard cable clamp or is there a better alternative?

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Jim Schmidt
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Sep 2017
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Jim Schmidt (Roseburg, Oregon, US) says...

I am installing a meter/disconnect and connecting to a load center elsewhere in the house. Meter is surface mounted on exterior of home. 4/0,4/0,4/0,2/0 SER cable will go through back of meter into wall. Question is how to I attach cable to box? Just cut larger hole in wall board to accommodate large metal cable clamp or is there a better alternative?

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David
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Sep 2017
David (Wpg, Manitoba, Canada) says...

Just checked out this site and wanted to say it is an awesome resource! Really glad I found this! Lots of great info even for someone who has worked in the trade!

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