do light switches have to be grounded?
167263
If you are replacing a switch a ground is not required, as per the above exception. However, if you're installing a switch; replacement or otherwise, into a metal box that is grounded. The switch will be ground via the devices yoke and mounting screws. So if the metal box is grounded, the switch is also grounded.
250186
The neutral also served as the ground (NOT the other way around as many people think). Also, that plug was replaced on that welder. It IS a straight 240v tool and does not require a neutral.
1452797
Yes. Safety switches have been mandatory in all new homes built in Victoria since 1991. They are also required to be installed into any home when an additional powerpoint and/or lighting fixutre is installed. How do you know if you have one installed already?
1077052
It is a lamp without its own switch. ... When the first electric lights where introduced, their switches on the fixtures where made looking like keys. So the Edison sockets introduced after that, designed to be powered via a switch on the wall, were “keyless”.
486795
A GFCI does not need a ground wire in order to trip properly. A GFCI simply trips when a fault is detected on the neutral wire. An ungrounded outlet will not trip using your tester.
379113
Is GFCI protection required in the attic? It's not in the NEC, but all that matters is the regulations your local jurisdiction has adopted. In general, GFCI is required for receptacles but not for lighting. Must be a local thing.
100933
Basically the metal cases on *everything* electrical should be grounded, so no problem with a bare ground wire touching any metal case/box. Also it is less expensive to manufacture the wire. Now if a bare ground wire were to contact a "hot" conductor, then this would trip the breaker*.
1434432
NEC Requirements for Ground-Fault Circuit Interrupters (GFCI) Commercial occupancies. Per 210.8, you must install GFCI protection for all 15A and 20A, 125V receptacles located in bathrooms, rooftops, and kitchens in commercial/industrial facilities. ... Every receptacle installed in kitchens must be GFCI-protected.
897725
According to the current National Electrical Code, there should be in a neutral in every wall switch box. This was not always the case as, strictly speaking, you don't really need a neutral in a lighting switch circuit.
1143621
5 amp sockets are used on the lighting circuit, meaning they are switched on and off with the light switches in the room, rather than being used like regular plug sockets. They are designed for appliances that take less than a 5 amp current, for example floor lamps, table lamps and fans.
379883
It's perfectly normal for a dimmer switch to be a little warm when your lights are on (or partially on). But if it's hot, there could be a problem. Dimmer switches get warm because they have electronic devices inside of them to take care of the dimming.
138961
The most common requirement of any hardwired automated light switch is a neutral wire. Yes, there are a few… (read very, very, very few) switches that don't require a neutral, but those will limit you to incandescent only.
716936
Beginning in 2011, the national electrical code required a neutral at almost all switch boxes. US houses built earlier than that may or may not.
1448822
The NEC now requires that virtually all branch circuits for lighting and receptacles in a home must have arc-fault circuit-interrupter (AFCI) protection. ... Note that the AFCI requirement is in addition to whatever GFCI protection is required—an AFCI does not replace or eliminate the need for GFCI protection.
734497
Most light fixtures will work with standard dimmer switches, including those with halogen and incandescent lamps. ... Likewise, not all compact fluorescent (CFL) light fixtures can be dimmed. If you install dimmable CFL lights, you'll still need to check your dimmer to make sure it works with these types of bulbs.
1406715
all network switches need power. If this is going to be by or very near your computer, you can find one that runs off 12v dc and use your PSU in your computer to power the switch. ComputerSecurityGuy : The closest to what you are looking for would be a switch that runs off PoE.
1128664
['Disconnect completely. Meaning that the electrical installation must be disconnected from live parts on all poles. ... ', 'Secure against re-connection. ... ', 'Verify that the installation is dead. ... ', 'Carry out earthing and short-circuiting. ... ', 'Provide protection against adjacent live parts.']