Question:
Here is a general question, I am planning a project and will eventually get
all proper permits but I want some advice to determine if this step is
necessary
I am planning to install a steam room in a new bathroom and it requires a
35A, 220V dedicated breaker. My house has a 100A service panel with one 50A
to the range, one 35A to the drier and about a dozen 20A wall plug circuits.
The question is: Is it likly that I will need to simultaniously upgrade the
service panel to 150A when adding this circuit? What is the rule about the
maximum capacity of a service panel?
Answer:
If air-conditioning equipments or electric space-heating equipments are to
be installed, the following
formula shall be applied to determine if the existing service is of
sufficient size.
Air-conditioning equipment* 100%
Central electric space heating* 100%
Less than four separately controlled space-heating units* 100%
First 8 kVA of all other loads 100%
Remainder of all other loads 40%
