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About to wire my new shop

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Richard

04-01-2001 18:59:32




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About to install 100 amp service to my 30x50 shop. I was going to install 200 amp but decided I really don't need that much.

My first question, how many 12ga wires can you run in 1/2 metal conduit and how many 14ga can run in 1/2"?

Next, I will be installing 3 8' flouresent lights in each bay for a total of 6 fixtures. These will all be wired together on a common switch. I planned to run 12ga but I've seen a lot of shops done with 14ga, so which do you all recommend?

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Rod Mi

04-02-2001 22:48:45




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 Re: About to wire my new shop in reply to Richard, 04-01-2001 18:59:32  
I would have 4 outlets boxes in stead of 2 outlet boxes if I had to billed again and you can never have to much power but you can have to little



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Dan S.

04-02-2001 10:17:49




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 Re: About to wire my new shop in reply to Richard, 04-01-2001 18:59:32  
To answer some of your questions: Quantity of wire installed in a conduit varies, depending on the type of insulation on the wire. By far the most common, least expensive and perfectly suitable for your needs, is THHN or THWN insulation. You may install 9-#12 gauge wires in a 1/2", or 12- #14 gauge. As far as your lighting is concerned, most 8' flourescent lights draw no more than 2 amps each. You may put them on a 20 amp circuit, but the code states that you may not exceed 80% of the circuit breaker's rating- in this case, 16 amps.(This is true for any circuit) Therefore, you may install 8- 8' lights on this circuit. As far as what gauge wire to use,the rule is this: 14 gauge on a 15 amp breaker, 12 gauge on a 20 amp breaker, 10 gauge on a 30 amp breaker, 8 gauge on a 40 amp or 50 amp breaker and 6 gauge on a 60 amp breaker. Good luck and be careful!

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Jerry

04-02-2001 06:15:08




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 Re: About to wire my new shop in reply to Richard, 04-01-2001 18:59:32  
I put some outlet boxes in the floor when the concrete was poured to use for large stationary equipment (table saw, lathe, etc). It sounds like that is not an option now for you.

You might consider running a few duplexes down the center of your ceiling to plug in some pull-down retractable extension cords. Very handy for working in the center of your shop...no cords on the floor!

Also, think about some airlines along the wall and/or ceiling. Again, very handy.

Good luck.

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gENE dAVIS

04-01-2001 20:50:38




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 Re: About to wire my new shop in reply to Richard, 04-01-2001 18:59:32  
You will be making avery big mistake installing only a100amp service,been there did that in my old shop! Install all the service capacity you can,then you will surely need the extra capacity later. Look up the start load and running amperages of welders,compressors grinders,etc., then you will see 100 amp service quickly filling up, I found out this the hard way in my old building!! JMHO.******LGD

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Norman

04-01-2001 22:07:06




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 Re: Re: About to wire my new shop in reply to gENE dAVIS, 04-01-2001 20:50:38  
I would not go with less than a 200 amp service. 12 gauge wire is about the same price as 14 gauge and makes the difference between running a 1 hp motor or a 2hp motor on 220 circuit.you should also consider doubling your lighting its easier to do it now than later.



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Richard

04-02-2001 04:39:24




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 Re: Re: Re: About to wire my new shop in reply to Norman, 04-01-2001 22:07:06  
Okay, you all talked me into it. It's only $300 more to do it now vrs. maybe a $1000 to change it later plus it would be a real pain.

These are the circuits I plan to run for the tools I have...

240v 50a - Spare 240v 30a - Air Compressor
120v 20a - Refrigerator
120v 20a - Freezer
240v 40a - Crackerbox (wire for 50amp service)
120v 20a - Lighting
120v 20a - South Wall Outlets
120v 20a - West Wall Outlets 1/2
120v 20a - West Wall Outlets 1/2
120v 20a - North/East Wall Outlets (only 2 or 3).
120v 20aGF - Horse Stall Lighting & Outlet.

All 240v circuits will be wired with 6 ga. wire for future 50 amp service if needed in the future.
All 120v will be ran with 3 strands of 12ga. using 1/2 conduit.

So what am I about to forget? No waterheater or bathroom, and no Air conditioners or heaters.....
Any suggestions?

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Rick

04-05-2001 19:45:56




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 Re: Re: Re: Re: About to wire my new shop in reply to Richard, 04-02-2001 04:39:24  
Welder maybe?



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paul

04-02-2001 09:59:17




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 Re: Re: Re: Re: About to wire my new shop in reply to Richard, 04-02-2001 04:39:24  
Are you mixing livestock (horse stall?) and tools in the same building?

Rust & condensation....

--->Paul



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Richard

04-02-2001 16:14:20




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 Re: Re: Re: Re: Re: About to wire my new shop in reply to paul, 04-02-2001 09:59:17  
No, No, No.... The horse stalls are in a different building however I was going to run the electricity from my shop since that is the closest source of power.

If it was up to my wife, the shop would have stalls in it and I would be still working under a tree!!!



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paul

04-02-2001 20:03:05




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 Re: Re: Re: Re: Re: Re: About to wire my new shop in reply to Richard, 04-02-2001 16:14:20  
Cool. :) I've seen a lot of people try mixing the 2, and it doesn't work! Glad you have it figured out. :)

--->Paul



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Dean

04-02-2001 10:19:40




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 Re: Re: Re: Re: Re: About to wire my new shop in reply to paul, 04-02-2001 09:59:17  
And phenomenal amounts of dust from straw, hay, feed, and manure! Do your really want to weld/grind in a building were one stray spark landing in straw will burn it to the ground? Consider another building for your four-legged friend!

Also, you don't specify the setup for your workbench but if you will have a 3/4 hp or greater bench grinder, you'll want it on its own circuit.

You may want to consider outside lights for the doors. I have a HID light with motion sensor on mine.

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