Non Fused Disconnect Clearance

This means a 30 by 36 inch space or larger in front of panels access panels on hvac equipment and fused disconnects.

Non fused disconnect clearance.

2 a 30 in wide working space in front of equipment operating at 600v or less. A fused disconnect will also help with certain downstream withstand ratings such as for some transfer switches etc. A 3000a service entrance fuse won t protect the non fused disconnect it needs to a fuse of a size that would go in the disconnect if it were fused. Nec 110 26 requires working clearance in front of equipment likely to require calibration testing or adjustment while energized.

You re not if you fail to comply with the following three clearance requirements in sec. And 3 minimum headroom. 110 26 of the national electrical code nec. There are two types of disconnect switches commonly used in commercial businesses.

A non fused disconnect generally has a short circuit withstand of 5000a and a fused disconnect very often has the withstand rating of the fuse that is inserted and approved by the manufacturer resulting in almost always 200k. The disconnect is a non fuse puller type and is ul listed with an enclosed pull out switch. There are fused and non fused non fusible. When dangerous fluctuations or interruptions are detected your disconnect will as you may expect disconnect power to the tool shutting off access safely before permanent harm or danger can arise.

1 at least a 3 ft clearance in front of all electrical equipment. Does this requirement extend to non.