Sub panel

[Trovmar]

Hi guys i am just curious what the sub panel rule is in the code. In the house i have two 150 amp circuit breaker panels that are loaded to the max. the customer wants 4 20 amp dedicated circuits to power his Christmas lights. I was thinking of putting a 100 amp sub panel in to get him more circuits. Is this OK , i forgot the rule. Any help would be appreciated thanks.

 

[fireryan]

Hi guys i am just curious what the sub panel rule is in the code. In the house i have two 150 amp circuit breaker panels that are loaded to the max. the customer wants 4 20 amp dedicated circuits to power his Christmas lights. I was thinking of putting a 100 amp sub panel in to get him more circuits. Is this OK , i forgot the rule. Any help would be appreciated thanks.

He must have alot of christmas lts

 

[ceknight]

Hi guys i am just curious what the sub panel rule is in the code.

110.26, maybe?

You'll be looking for that "subpanel rule" for a long time. Might be easier to do a load calc.

 

[LarryFine]

In the house i have two 150 amp circuit breaker panels that are loaded to the max.

There's a difference between being maxed out circuit-quantity-wise and being maxed out ampacity-wise. Make sure you have the ampacity overhead in one of the panels first.

Just move two adjacent existing circuits, along with your four new ones, to a new 8-space (for future) sub-panel, supplied from a new 2-pole breaker in the abandoned two spaces.

 

[ceb58]

He must have alot of christmas lts

Not really, I have a customer who had a separate 200amp installed for just Christmas lights. He had to put some of the lights on one of the other 2- 200amp panels for the home and was triping breakers from overload.

Cant believe we are talking about Christmas where did the summer go:-?

 

[celtic]

In the house i have two 150 amp circuit breaker panels that are loaded to the max.

Before we go any further.....what does that mean?
No breaker slots?
Drawing 149A?
Drawing 299A?

Just how big/small is the service?

 

[MikeGee]

There's a difference between being maxed out circuit-quantity-wise and being maxed out ampacity-wise. Make sure you have the ampacity overhead in one of the panels first.

Just move two adjacent existing circuits, along with your four new ones, to a new 8-space (for future) sub-panel, supplied from a new 2-pole breaker in the abandoned two spaces.

I keep telling the hvac salespersons at my company this. "oh there is plenty of room in the panel". First off with out taking the cover off how do you know the buss goes all the way down. Did you look at the size of the feeds. Are the appliences electic or gas? oh sheesh I was off the subject.

 

[sparky_james]

service upgrade

service upgrade

Id do aload calc and relize that there overloaded and sell them a service upgrade, just a thoght..:grin:

 

[Cow]

First off with out taking the cover off how do you know the buss goes all the way down.

I've been noticing this a lot with Sq D panels lately. Filled a panel all the way with breakers one day, knocked all the slots out of the deadfront just to realize there were 6-8 extra slots in it when I went to install it. Pass the breaker blanks please...:roll: