low voltage LED sign disconnect

[mstrmp3]

We have a low voltage LED sign (24vdc 600 milliamp) on the outside of a parking deck. the 24vDC transformer is plugged into a 15a 120v recepticle inside a parking gate operator which has a locked door. No exposed wires and all in EMT conduit.

Do I still need a disconnect at the sign or can turning off the breaker inside the parking gate suffice?

**note** the sign and parking gate are withthin line of sight of eah other.

 

[mcclary's electrical]

We have a low voltage LED sign (24vdc 600 milliamp) on the outside of a parking deck. the 24vDC transformer is plugged into a 15a 120v recepticle inside a parking gate operator which has a locked door. No exposed wires and all in EMT conduit.

Do I still need a disconnect at the sign or can turning off the breaker inside the parking gate suffice?

**note** the sign and parking gate are withthin line of sight of eah other.

line of sight and less than 50 ft?

 

[mstrmp3]

no more like 100 ft.

 

[mstrmp3]

more like 100 ft.

 

[mstrmp3]

does having a disconnect in the gate meet 600.6a(2)?

 

[hbiss]

I think that is a really good question considering it is low voltage and only 600ma.

-Hal

 

[mstrmp3]

anyone have an answer?

 

[Cavie]

We have a low voltage LED sign (24vdc 600 milliamp) on the outside of a parking deck. the 24vDC transformer is plugged into a 15a 120v recepticle inside a parking gate operator which has a locked door. No exposed wires and all in EMT conduit.

Do I still need a disconnect at the sign or can turning off the breaker inside the parking gate suffice?

**note** the sign and parking gate are withthin line of sight of eah other.

Seems to me you answered you own question. "Cord as disconect", "Locked door", "within sight of". I see no problem. If someone has a problem with that simply add a cheapo toggle sw at the sign.

 

[Cavie]

See 600.6 Exception 2. Also 600.6 (A) (1). " Within sight of the sign". No mention of 50' NEC 2005

 

[dbuckley]

Without being a code guru, it sounds silly to me to require a disconnect on a 24VDC source.

Does a doorbell transformer secondary require a disconnect within sight of the doorbell?

Allied to that the 24VDC circuit is on the user side of the 110V outlet the transformer is plugged into, so could one argue one is dealing with an appliance?

 

[mstrmp3]

I totally agree, but the inspector said that it (code) doesn't differentiate between low or high voltages when comes to electric signs.

Even with my LV elec. license, I still have to ask because of the numerous gray areas concerning low voltage (<30v and <1amp) circuits.

I wish the NEC would come up with a code book just for LV

 

[benaround]

See 600.6 Exception 2. Also 600.6 (A) (1). " Within sight of the sign". No mention of 50' NEC 2005

Cavie, FYI, see definition of "In sight from" Article 100, that is where the 50' distance is

stored. Any time 'in sight from' , 'within sight from' , or 'within sight' is used the 50 foot

distance is part of the requirement.