Underground service for detached garage

[VirutalElectrician]

That'd be one hell of a detactched garage if it actually needs a 200 amp service. Do a load calc for the garage and then see if your still worried about 83%.

In floor electric heat sucks up amps quickly. My 1200sq garage has a 60 amp for the heater and 15 amp for the pump. Not much left of my 90a sub panel. And they told me that heater was under sized for my sq foot, but it was the biggest they could put in.

 

[VirutalElectrician]

Amen if you have room for a 2nd building that's a great way to start. I like the one with the 816 feed thru on the 1st main and then you have an open spot for another 150 or 200.

Which model panel is that?

 

[Dennis Alwon]

In floor electric heat sucks up amps quickly. My 1200sq garage has a 60 amp for the heater and 15 amp for the pump. Not much left of my 90a sub panel. And they told me that heater was under sized for my sq foot, but it was the biggest they could put in.

Why does electric heat need a pump? Electric heat in the floor is not meant to heat a room it is only to keep the floor from getting cold.

 

[Dennis Alwon]

You must have water lines in the slab that are heated thru a heat pump????

 

[Poweranytime]

Which model panel is that?

It's a 400 amp meter main with 816 panel with feed thru lugs siemens BR GE siemens they all make

 

[VirutalElectrician]

You must have water lines in the slab that are heated thru a heat pump????

Yes. It's water pipes in the floor heated with an electric boiler. I should have stated that more clearly.

 

[retirede]

In floor electric heat sucks up amps quickly. My 1200sq garage has a 60 amp for the heater and 15 amp for the pump. Not much left of my 90a sub panel. And they told me that heater was under sized for my sq foot, but it was the biggest they could put in.

I have a similar setup, except gas-fired.
Your pump won’t draw more than a couple of amps. It’s on a 15A circuit because hardly anyone runs anything smaller.