Main Disconnect Switch Height

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All answers based on unamended national electrical codes.

Main disconnect switch height.

Since the top of the panelboard is more than 6 1 2 feet above the floor the minimum working space height required for this panelboard is the height of the panelboard. More than two main disconnect switches in the main panel are required to turn off the panel presuming this is a main residential panel hosting more than 6 circuits total see next bullet. Main disconnect switches circuit breakers and molded case switches equipped with door mounted rotary handles and installed in industrial control panels for industrial machinery applications essentially require the use of an additional internally mounted supplementary handle in. So it makes sense that the height of your main switch is accessible without having to find a step ladder or chair to reach it.

Typical is 4 to 5 6 to the center of the meter. The minimum working space height required for this disconnect switch is 6 1 2 feet see figure 1. That s why your main switch shall not be more than 2 meters above a ground floor or platform. The top of the disconnect switch is only 72 inches 6 feet above the floor.

The minimum working space height required for the disconnect switch is 6 1 2 feet see figure 6. The 2011 nec clarifies that the branch circuit overcurrent device can serve as the disconnect for appliances if they are not over 300va or 1 8 hp 422 31 a. The last thing you would want to do is look for a ladder in an electrical emergency when you need to switch off your main switch. If you were to switch your main switch off then it will disconnect all the electricity to your house or business.

No main disconnect switch in electrical panels with six or more breakers. If the six breaker rule is allowed locally the six switches must be together in. Since the switchboard height is greater than 6 1 2 feet the minimum working space height required is the switchboard height 7 feet.

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