How much service do I need?

[Elder]

I'm running a 220v single phase compressor, a syncrowave 180sd tig and a yet to be purchased heat and ac unit (motel style) among several outlets and lights. I've been told I need more than 100amp service. Does anyone want to weigh in on this for me?

 

[Alchymist]

Would need electrical specs on each piece of equipment to comment.

 

[porschedude996TT]

I have a one or two man shop, 6hp 240v compressor, Miller 200 Syncrowave, tons of lights, forced air furnace, and I am running it off a 100 amp breaker to a sub-panel in the shop. The welder is hooked up to another 50 amp sub-panel that has my spa tub connected to it. I just turn off the spa when i run the welder. The 100 amp sub is getting its power from a 100 amp breaker in a 125 amp panel on the house.

Each leg of that 100 amp feed is capable of 100 amps at 120volts or 100 amps at 240 volts.

I say your fine if your heating and cooling loads are low. What is your weather like? You don't have a location on your avatar.

 

[Elder]

We see all the seasons here in Iowa, ill have to get my profile up to date.

 

[theoldwizard1]

I have a one or two man shop, 6hp 240v compressor, Miller 200 Syncrowave, tons of lights, forced air furnace, and I am running it off a 100 amp breaker to a sub-panel in the shop.

I concur.

100A should be fine. You may have to turn off the compressor while welding at max. Your combo heat and A/C unit should not be an issue.

If you are even remotely thinking about a plasma cutter, this changes the equation a lot because it requires the compressor to be running at the same time.

 

[BD1]

100 will be fine. Like stated , using plasma may have the compressor kick on. That won't be a issue.

 

[Elder]

I don't have intentions for a plasma but if I did could I shut off the heat or air unit to be able to run both? Good news then I really didn't want to have to run more than 100amp because then they were going to charge me more monthly just to have the service

 

[FDNY-L107]

Make sure you also take into account future growth needs. Double whatever you come up with, you can never have too much power.