About BFS Products Controls Group News Publications BFS Reps
Publications

Disconnecting Means

The National Electrical Code® (NEC®) specifies Disconnecting Means for motor circuits in Article 430, Part IX. BFS offers two design options to the meet these NEC® requirements: disconnect switches and (molded case) circuit breakers.

When fuses are chosen for the branch circuit protection, disconnect switches may be added to a System Control Center. The BFS option adds a disconnect switch to each branch circuit, two in a duplex panel and three in a triplex panel. Each disconnect switch is supplied with an external handle, so that the switch may be operated without opening the enclosure. In order to protect the internal components, the handle must seal its own mounting holes. BFS uses one handle version for Type 1 and 12 enclosures, and another version for Type 4 enclosures.

When circuit breakers are chosen for branch circuit protection, external handles are included with the option. As with disconnects, there is one handle version for Type 1 and 12 enclosures, and another version for Type 4 enclosures.

Since most BFS equipment contains a dedicated standby pump, it is useful to have a disconnecting means for each branch circuit. Upon a pump failure, that particular branch may be locked out while the standby pump is operated. This allows the equipment to still perform its function while repairs are being made. Using a main disconnect for the control panel does meet the NEC® requirements, but it may cause undesirable system downtime.

National Electrical Code® and NEC® are registered trademarks of the National Fire Protection Association.