Hot tub panel

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Oakey

Oakey

Senior Member
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New Jersey
Below is a 200 amp service I looked at today. Main disconnect to trough then 2-100 amp QO panels, 1-30 space.1-12 space. My customer wants to install a 50 220 volt hot tub, is it possible to tap the main in the trough to a hot tub panel (say 60 amp)or should all be ripped out and replaced with 1-200 amp panel? Can this type of setup even be tapped with 3 feeders...There are 30 existing circuits as of now. Opinions anyone?

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Oakey, as long as each panel has a main breaker, you can have up to six disconnects. Tapping another box into the trough is okay.

However, there should be no probkem adding a 50a circuit to whichever panel has the space and/or less load.

Stick, the panels are not full.
 
What you've proposed is fine. Since you're on the load side of the 200 main you could install as many taps as you want to as many panels as you want. I would try to get the new 50 amp circuit into one of the existing panels even if it meant moving a circuit or two to balance the loads between the existing 2-100 amp panels.
 
LarryFine said:
Oakey, as long as each panel has a main breaker, you can have up to six disconnects. Tapping another box into the trough is okay.

However, there should be no probkem adding a 50a circuit to whichever panel has the space and/or less load.

Stick, the panels are not full.
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Saw that after I posted, thanks...
 
Thx guys:) . Since there is a 200 main disconnect would the existing 100's be considered sub panels? Can I still put the tub into one of them?
 
Oakey said:
Thx guys:) . Since there is a 200 main disconnect would the existing 100's be considered sub panels? Can I still put the tub into one of them?
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Yes the 100's are sub panels and if the load works you can put the tub in one of the existing panels. I think Trevot suggested that already.
 
Oakey said:
Pardon my confusion
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, but aren't pools and the like only allowed go to the main panel?
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Subpanels for pool equipment are installed all of the time. Actually the simplest way to provide the needed circuits in close proximity to the pool, especially if the pool is very far away from the service.
 
infinity said:
What you've proposed is fine. Since you're on the load side of the 200 main you could install as many taps as you want to as many panels as you want.
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A little bit off the subject, i am unclear on the tap rules. I have worked through a few practice problems applying say the 10' tap rules off of a feeder to supply a sub panel; that concept is fairly clear. what is unclear is that there is never any mention of recalculating the load calculations for the feeder that it is being tapped from? What prevents the feeder from becoming overloaded when taps are used?
 
thetacon said:
What prevents the feeder from becoming overloaded when taps are used?
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Nothing will prevent it from being overloaded if the some sort of calculation isn't performed. However the OCPD upstream of the feeder will protect the feeder conductors.
 
so using the hut tub panel as an example of using a tap rule what are the steps to calculating the new sub panel?

1) calculate the existing services actual load: using either the standard or optional res. cal. or must i contact the utility dept for actual kva usage.

2) calculate new subpanels load

3)add the new load to the existing load and see if feeders can support the additional load

OR

Because the taps are landed into there own ocpd which would protect the feeders would i be able to just install the panel and be code compliant if i meet the tap rules, regardless of the additional load to the feeders.
 
If its just the one circuit for the hot tub, then you should just save yourself time, money, and headaches by running the hot tub off one of the existing panels.
 
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