Circuit Breaker Sizing on HKSC10 and Smaller Heat Kitsby HVAC Distributors January 11, 2018
Goodman released the following bulletin, G-GN-OT-1494, regarding circuit breaker sizing on heat kits:
Circuit breakers furnished with the heat kits of 10kw and less are for safety disconnect purposes only and are not supplied to be used for circuit protection. The 60 amp breaker has been tested and approved by ETL to be used with the HKSC10 and smaller heat kits. The breaker is sized for 208/230V operation and approved by ETL for use with both voltages.
Heat Kits are shipped with label indicating “CIRCUIT BREAKER IS NOT INTENDED FOR BRANCH CIRCUIT PROTECTION. IT SERVES AS A DISCONNECT ONLY.”
At installation of the heater, this label should be affixed to the front of the indoor unit.
Note that the circuit breaker for the air handler branch circuit protection must be properly sized according to the MOP value. Please reference the product specification sheet for these values.
Paragraph 90.7.of the NEC states the following:
It is the intent of this Code that factory-installed internal wiring or the construction of equipment need not be inspected at the time of installation of the equipment, except to detect alterations or damage, if the equipment has been listed by a qualified electrical testing laboratory that is recognized as having the facilities described in the preceding paragraph and that requires suitability for installation in accordance with this Code.
If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.