Attached garage & equip wire size question

[aar_man]

After years of someday, I finally want to use some the equipment I have been acquiring.
I added 8 feet onto my attached house garage and am installing:
1055 Coats tire balancer => 20A; L6-20 plug
Miller 210 welder=> 50A; 10-50 plug
Hypertherm 600 plasma cutter=> 50A; 6-50 Plug
3HP Delta Unisaw=> 15A; 6-15 plug * was going to use the 6-20 Recept. along with a 20A wire.

This is all 240V equipment.

I am figuring on several outlets and 2 overhead, 4 bulb flour. lights.

I have purchased a 100A 20 breaker Square D subpanel. I was thinking of supplying 60A to the subpanel with a 60A breaker on my main panel. Wasn't planning on running everything on at once.

The feed length from the subpanel to each of the 4 major recepticles above will be under 4 feet in length but the Unisaw will be 8 feet.
The feed length from my main house panel to the subpanel will be about 85-90 feet figuring the sweeps. The basement run is about 45+/- feet of the 85-90 total. I installed 1.5" conduit under the garage slab years ago and it terminates in the basement wall so the final 45+/- feet will be in conduit up into the subpanel.

I am looking for wire feed help for both the machines as well as the subpanel. There are a number of wire feed questions about detached garages/pole building on GJ but I didn't really find any scenario's like mine on the board.

I hope you can help.

 

[wyliesdiesels]

If u dont want to run conduit, then use SER.

Best bet is #2 AL SER with a 90a breaker.

U will need to isolate the neutral bar and may need to add a ground bar in the subpanel

 

[pattenp]

As Wylie suggested, use 2-2-2-4 Al SER with a max of a 90A feeding breaker. When terminating aluminum wire at the lug connections be sure to use Noalox anti-oxidation compound on the wire ends. You can use a 60A feeding breaker if you want to. The 60A may be the smallest breaker to fit #2 wire.

 

[theoldwizard1]

Segue

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Miller 210 welder=> 50A; 10-50 plug
Hypertherm 600 plasma cutter=> 50A; 6-50 Plug
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Other than the size/shape/location of the pins on the 10-50x and 6-50x what is the difference, or why would you use one versus the other ?

My research shows, they are both 2 hots and a ground.

 

[wyliesdiesels]

Segue


Other than the size/shape/location of the pins on the 10-50x and 6-50x what is the difference, or why would you use one versus the other ?

My research shows, they are both 2 hots and a ground.

I missed that in the OP but they are NOT the same. A NEMA 10-50 is non grounding dual voltage 125/250v outlet. A 6-50 is a grounded 250v outlet. So theyre NOT both 2 hots and a ground.

10-50s are no longer used for new installs. They are the old range plug. A range now requires a 14-50.

For the OP he needs a 6-50 for 240v equipment.

 

[CNGsaves]

With all that equipment, go BIGGER rather than smaller so follow the GJ Sparky advice and with the 90A solution with large aluminum feeder.

Good luck. Let's see pics when you get it all setup up !!

 

[aar_man]

Guys,
Thanks for the replies. I will look into the Al SER to feed the subpanel.

As far as the equipment:
10-3 for the balancer?
what would you recommend for the 2 50A outlets?
Would you run 12-2WG for the Unisaw or go to 10? I thought I read on the Delta site that it was suggested to tape the white-red and use it as the 2nd hot feed.
Not too sure on that one...thoughts from any Unisaw owners.

There was mention about the 10-50. That is the plug on the welder, should it be changed out to the 14-50 that was discussed?

 

[wyliesdiesels]

The coats 1055 needs a 6-20 and #12 wire.

The welder has the wrong plug on it- the 10-50 is a non grounding plug. A 14-50 is the worng plug as well.

Both the welder and plasma cutrer need a 6-50 with #8 THHN or #6 NM-b

The 3HP saw should have a 6-20 and #12 THHN or #10 NM-b

 

[aar_man]

Wylie,
Thanks for the help. Getting set to purchase the feed wire and wanted to double check my research.
It is my understanding that with the NEC code change in 2008? 2-2-2-4 SER can't,by code, be used in a wet environment and conduit underground is deemed "wet".
Since part of my run is basement(was planning through the joists) to the conduit and then in conduit under the garage floor and then into the subpanel...I can't use SER?
Instead, because of the conduit, do I need 2-2-2-4 MHF USE-2 with RHW-2 to be able to go from underground conduit to conduit inside my home to my panel? Could I use THWN?
If I use URD or USE then it can't enter the house and needs to be spliced to something that can come inside?

Lots of hoops to jump through but I guess it makes sense if it keeps the fire trucks away.

 

[wyliesdiesels]

Wylie,
Thanks for the help. Getting set to purchase the feed wire and wanted to double check my research.
It is my understanding that with the NEC code change in 2008? 2-2-2-4 SER can't,by code, be used in a wet environment and conduit underground is deemed "wet".
Since part of my run is basement(was planning through the joists) to the conduit and then in conduit under the garage floor and then into the subpanel...I can't use SER?
Instead, because of the conduit, do I need 2-2-2-4 MHF USE-2 with RHW-2 to be able to go from underground conduit to conduit inside my home to my panel? Could I use THWN?
If I use URD or USE then it can't enter the house and needs to be spliced to something that can come inside?

Lots of hoops to jump through but I guess it makes sense if it keeps the fire trucks away.

First off SER is jacketed so it doesnt need to be in conduit. SER can be used in wet locations such as surface mounted on siding coming out of the bottom of a meter pan but Yes that is correct SER cant be used in underground conduit.

Is there a way to route it so it doesnt go underground? Using it in the basement is fine. The SER can be ran through the holes in the joists as long as its not subject to damage.

If u absolutely have to make part of the run in underground conduit, then yes MHF would be your best bet.