60 amp breaker on a 100 amp service

[Alias A]

I have a older home with a 100 amp service and want to add a 60 amp sub panel for a 60 amp rated spa. My hvac unit with air conditioner uses about 30 amps. I will be using about 90 amps total if they are both on at the same time. Also lighting etc... Will a 100 amp service be enough?  Also how much amps does a 60 amp spa actually draw?

[cranbiz]

It's pushing it as when the AC is on and your normal house load, you certainly could exceed the service limits. A 60A rated spa will use probably 55A if running all the pumps, blowers and heater.

I know that you don't want to hear this but you probably should upgrade your main panel.

[Water Boy]

Would not be up to code, and I doubt any electrician would install that. Like the other guy said, might just have to bit the bullet and upgrade panel.

[Spatech_tuo]

The question is fine (if you're not sure, ask) and NOT AT ALL uncommon but the answer is a clear "sorry but that won't fly". The only time that setup happens is when someone has a reckless brother-in-law who considers himself a DIY electrician but barely understands what he is doing and/or figures "what the heck, its not my house".

[Alias A]

Any idea what upgrading the service panel would cost??

[heliguy]

Late reply but your first step is to contact your electrical provider (the utility you pay your bills to). They are responsible for the cables from the pole to your house. Then you need to contact an electrician to upgrade your actual panel. You're probably looking at a minimum of $1000, but I can't say for sure. Connecting that load to your existing panel is just asking for trouble/headaches and you are best off dealing with this problem now, regardless of the tub.