Mike Dolt Enterprises
Mike Dolt Enterprises
User: Viking302, Location: east bay
Asked on: Tuesday, April 19, 2011 at 2:51 pm EDT
Answered on: Tuesday, May 14, 2024 at 4:24 am EDT
Question: If a fancoil is 208 1ph with a little DC motor at 1.3FLA and the max fusible for the unit is 15amps. Can I use a 2p toggle switch with lockable means by itself if its feed from a HACR breaker or would I still need a in-line fuse to the switch. Instead of a bulky 30amp disc. with 15amp fuses. I have 20+ units.
You would still need an in-line fuse to the switch.
Reasons
HACR breakers are not rated for branch circuit protection. While HACR breakers can protect against faults and overloads, they are not designed to protect against branch circuit overcurrents. The lockable toggle switch does not provide overcurrent protection. The purpose of a lockable toggle switch is to prevent unauthorized operation, not to protect against electrical overloads. The maximum fusible rating for the unit (15 amps) is lower than the current draw of the fancoil (1.3 FLA). This means that a fuse is required to protect the unit from potential overcurrent conditions.
Recommended Setup: Use a 15-amp fuse in-line with the feed to the toggle switch. The fuse will provide overcurrent protection for the fancoil and the toggle switch. The lockable toggle switch can be used to control the power to the fancoil while the fuse ensures electrical safety.Using a bulky 30-amp disc with 15-amp fuses is not recommended as it is not a standard or safe practice. Flag for review