Em Lighting Key Switch

[Alwayslearningelec]

What is this for(em lights) and how is it used?
Thanks.

 

[480sparky]

What is this for(em lights) and how is it used?
Thanks.

What is it?

 

[masterinbama]

Do you mean this kind?

http://www.levitonproducts.com/catalog/dept_id_958/model_1222-2KL.htm


They are used to keep unauthorized people from turning out the lights.

 

[480sparky]

Do you mean this kind?

http://www.levitonproducts.com/catalog/dept_id_958/model_1222-2KL.htm


They are used to keep unauthorized people from turning out the lights.

What reason would anyone have to turn off emergency lights?

 

[masterinbama]

I wired a local community center that turns out the EM lights when it is not occupied. Actually that switch controls a set of contactors for a 100 amp EM lighting panel and a 200 amp normal lighting panel.

 

[480sparky]

I wired a local community center that turns out the EM lights when it is not occupied. Actually that switch controls a set of contactors for a 100 amp EM lighting panel and a 200 amp normal lighting panel.

EM lights or night lights? I would think the FD would have an issue with EM lights being shut off for any reason.

 

[iwire]

What reason would anyone have to turn off emergency lights?

When the EM lighting is provided with the same fixtures as the normal lighting it is common to want to shut them off but they must come during a power failure regardless of any switch positions. Sometimes for energy savings and sometimes because you just want the option to make the room dark.

I did a large department store where the last person out hit a key switch and at least 95% of all branch circuits would power down, lighting, exit signs, receptacles pretty much everything except the office area.

 

[LarryFine]

I did a large department store where the last person out hit a key switch and at least 95% of all branch circuits would power down, lighting, exit signs, receptacles pretty much everything except the office area.

So, what happens if the power goes off while the burglars are inside? How do they see their way out?

 

[iwire]

So, what happens if the power goes off while the burglars are inside? How do they see their way out?

The EM lights would come on. Same if a the fire alarm trips, the lights will come on.

I can tell you it is pretty strange to walk around a large mall anchor store in total darkness, the mannequins are scary.

 

[480sparky]

When the EM lighting is provided with the same fixtures as the normal lighting it is common to want to shut them off but they must come during a power failure regardless of any switch positions. Sometimes for energy savings and sometimes because you just want the option to make the room dark.

I did a large department store where the last person out hit a key switch and at least 95% of all branch circuits would power down, lighting, exit signs, receptacles pretty much everything except the office area.

So the switch doesn't turn off the EM lights......... just the night lights.

 

[Alwayslearningelec]

Em & nl

Em & nl

What is the difference between the two.

 

[electricmanscott]

I can tell you it is pretty strange to walk around a large mall anchor store in total darkness, the mannequins are scary.

Scary or sexy?

 

[walkerj]

Scary or sexy?

From my experience, I would say a little bit of both

 

[480sparky]

What is the difference between the two.

EM lights only come on when power goes off for egress safety.

Nightlights stay on 24/7 for security.

 

[quogueelectric]

The EM lights would come on. Same if a the fire alarm trips, the lights will come on.

I can tell you it is pretty strange to walk around a large mall anchor store in total darkness, the mannequins are scary.

They talk to you too??

 

[masterinbama]

EM lights or night lights? I would think the FD would have an issue with EM lights being shut off for any reason.

We used a normally closed contactor on the EM panel. When normal power failed the contactor coil would lose power closing the contacts allowing the generator to pick up th lighting.