Lighting Contactors
Lighting Contactors
(OP)
why is recomendated ligthing contactors in ligthing parks, adventages or disaventages vs.use of breakers only?
Thank you.
Hector Hi
Thank you.
Hector Hi
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RE: Lighting Contactors
RE: Lighting Contactors
"Venditori de oleum-vipera non vigere excordis populi"
RE: Lighting Contactors
A typical lighting-contactor style is
www.ab.com/en/epub/catalogs/12768/229240/229248/30...
Their main application is for groups of fixtures where gang-controlled at one point such as a photocell or time clock, or switched manually from multiple points, using conventional 3-wire control.
Some applications may dictate magnetically latched contactors like
www.ab.com/en/epub/catalogs/12768/229240/229248/30...
These devices will maintain their last state through a power interruption. An advantage is that as soon as power is restored, the lighting will be powered without need for human interaction.
RE: Lighting Contactors
The NEC would require breakers used for switching HID fixtures to be marked HID, not HACR. Most branch circuit breakers of the bolt on type and some of the plug in type are so marked without extra cost of special order.
"240.83 ... (D) Used as Switches. Circuit breakers used as switches in 120-volt and 277-volt fluorescent lighting circuits shall be listed and shall be marked SWD or HID. Circuit breakers used as switches in high-intensity discharge lighting circuits shall be listed and shall be marked as HID."
Of course for the reasons stated in the other posts, the use of a lighting contator is a better installation.
Don
RE: Lighting Contactors
It has been a while since I had to deal with small CBs, thanks for the update. I still think that breakers are an expensive switch becuse of the cost of replacing them when they wear out. In my mind it is better to let the breaker do it's designated job of protection, leave the switching to switching devices.
"Venditori de oleum-vipera non vigere excordis populi"
RE: Lighting Contactors