Rating and Use of Switches

Code 404.14. Rating and Use of Switches

Snap Switches

• : a manually operated electric switch with a blade which makes contact with a snap and in which the speed of making or breaking of the circuit is independent of the speed of operation of the switch.

• https://www.merriam-webster.com/dictionary/snap%20switch

• Control Switch Rating. Switch, flashers, and electronic power supplies shall be rated to control inductive loads. (NEC Code 600.6 B)

Alternating-Current General-Use Snap Switch

• Ac snap switches are used to control:

• Inductive loads that have amps rated at the voltage applied.

• Tungsten filament from surpassing the amp rating of the switch which is 120 volts.

• Motor's have an application voltage that isn't lower than the horsepower rating. (Amps don't exceed more than 80% of the rated volts)

• NEC Code 430.109 (C) (2)

AC or DC General-Use Snap Switch

• This new switch is able to control both ac and dc circuits

• Rather than the ac switch we converse about in the last slide, this switch's ability is capable of controlling motor loads if rated in horsepower.

• Like the AC Snap Switch this switch also controls inductive loads that are amp rated from exceeding the applied voltage.

• Tungsten filament lamp loads have rated amps that don't exceed

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Copper Aluminum Revised

This snap switch is going to rated at 20 amps or less that is directly combined with an aluminum conductors could possibly be listed as an CO/ALR.

it is a intended connection to aluminum but can also be used with copper.

AC Snap Switch Rated 347 volts

• Snap switch that has 347 volts ac shall be used to control noninductive loads other than tungsten filament lamps at their rated amps and volts

• Controlling inductive loads by not exceeding the rating of 15 amps and 347 volts ac

• These switches cannot be interchanged with snap switches in a AC or DC General-Use Snap switch.

• General uses are outdoor lighting systems, and can used for lower voltage circuits such as 277v and 120v circuit

Dimmer Switches

• Control incandescent luminaries

• Does not control cord-and-plug motor-operated appliances or portable fluorescent lamps.

• Can be used for fluorescent lighting and portable lighting.

Cord- and Plug- Connected Loads

• A snap switch and control devices can be used to control plug- and cord- connected.

• Controlling receptacle outlets or cord connectors that are given a permanent connected cord needs a maximum permitted amps

• Code table 210.21 (B) (2) -->

• 210.21 (B). "A single receptacle installed on an individual branch circuit shall have an amp rating less than the branch circuit