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I'm adding a hot tub to our backyard. The hot tub can pull up to a max of 60 amps when all the pumps and heater are going. However, a sales rep said it's not common that you would be pulling all 60 amps at once. The problem is that we only have 100 amp service. The place we are buying the hot tub from recommended 2 electricians. One didn't seem too thrilled about having to potentially upgrade to 100 amp, so he never sent a quote over and ignored our calls. The other said 100 amp service would be fine. Our house isn't particularly large, just 1500 sqft. He said for our size house we're probably only pulling about 20-30 amps now and wouldn't invest in upgrading to 200 as it can be pricey and unnecessary. We do have gas and that is used by our water heater, stove, and furnace.

Would a 100 amp service cut it?

The electrician did say that we don't have any room left in the panel so a new sub panel would need to be installed to the right. He said that would be cheaper than installing an entire new one.

Link to album: https://imgur.com/a/S0AjrL2

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  • Can you post photos of your breaker panel please? – ThreePhaseEel Jul 9 '20 at 2:10
  • @ThreePhaseEel, yep! Just added an album. – Eric Jul 9 '20 at 2:24
  • Yeah, you’ve got an all electric house (except water heater??) crammed onto a 100A service. It can just handle what you got now, but no more. – Harper - Reinstate Monica Jul 9 '20 at 3:10
  • @Eric -- how many kW is your oven/range (and is it just an oven, or a full range), how many amps does your A/C pull, and how many circuits do you have feeding your kitchen countertop receptacles? – ThreePhaseEel Jul 9 '20 at 3:18
  • I would install a 200 amp service to be safe. Your service is too small for what you are trying to add. – d.george Jul 9 '20 at 10:27

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