Electrical Disconnect Switch Code Requirements

These general guidelines will give you the basics of what electrical inspectors are looking for when they review both remodeling projects and new installations.

Electrical disconnect switch code requirements. Nec 430 102 disconnect for electric motors driving equipment or machinery provides minimum distance requirements for the disconnect for the electric motor or its controller. Easily selectively coordinated this switch meets all of the applicable code requirements for the elevator code fire alarm code and national electrical code nec. Article 430 requires motors to have a lockable disconnect within sight. Generators must have one or more disconnecting means that disconnects all power except where.

There are many major changes in the 2002 national electrical code nec but none will affect more installations than the change involving motor disconnect locations as more municipalities accept the 2002 nec electricians electrical contractors and electrical maintenance personnel working on residential commercial and industrial installations may now be required to provide motor disconnects. The nec article 625 covers the wires and equipment used to supply electricity for charging an electric vehicle. The code covers all wiring in and around structures. Nec 430 102 a motor controller disconnect paraphrasing the disconnect must be in sight from the controller and must disconnect the controller from its power source.

One of the changes in the 2014 edition of the national electrical code nec was a new section in article 110 pertaining to lockable disconnecting means. This national electrical code was mainly implemented to accommodate potential future uses. The horsepower rating is actually for the motor of the appliance yet it raises a concern. This is significant because a number of sections throughout the code contain requirements for disconnecting means.

Mike holt enterprises inc. The nec national electric code is part of the national fire code and is mandated by most state or local law in the usa. That s not the only disconnect related change in art. All switch locations need a neutral wire.

How you apply the requirements of 422 31 depends on the va rating and horsepower rating of the appliance. It is important to have a good understanding of these requirements. Wiring switches without a neutral wire. Electrical codes are in place to protect you the homeowner.

Electronic switches require a small amount of constant electricity and therefore need a neutral wire run to them.