Standard Light Switch Box Dimensions

This is kyle switch plates light switch cover reference page where you ll find information on 400 sizes terminology and faq s.

Standard light switch box dimensions.

Octagon and standard size round boxes range from 1 1 2 to 3 inches deep and are the standard box for ceiling or wall mounted light fixtures weighing up to 50 pounds. Kyle switch plates stocks the largest selection of switch plate sizes on the web so you can find the wall plate you need. Measure 2 inches under that mark and make another mark for the bottom of a standard 4 inch electrical box. Position the bottom of the box on that mark and fasten it to the stud.

A standard rectangular shape is the most common electrical box. If the counter has no knee space the counter width shouldn t exceed 24 inches and the. It houses a single electrical switch or outlet and comes in metal or nonmetallic units. Minimum box depth box depth for extra wiring space minimum box depth dimensions 25mm 35mm for compliance to bs 1363 use either a 35mm back box or the k1000 pattress features l moulded on indicator flash on switches will not rub off totally safe l 3 pin operated safety shutter on 13a socket outlets usb 2 0 and 3 0 compatible.

As for the outer edges of the plates these are pretty close but actually can differ by as much as 1 4. When the switch is over a counter that has a knee space and the counter depth exceeds 20 inches the maximum height of a switch is reduced to 44 inches. The standard dimensions are for the switch itself which will include the hole for the switch and the ability to be screwed on the top and bottom of the switch. The height from the floor to the middle of the switch plate should not exceed 48 inches and the minimum height should not be less than 15 inches.

Different electrical box sizes fit varying installation needs. Metal boxes are suitable for surface mounted installations using metal conduit. When mounting a light switch over a countertop for example in an indoor or outdoor kitchen an art studio or a craft room reduce the standard wall mounting height to 40 inches. They provide much more room for wiring than shallow round pan boxes and can be used as junction boxes.