Forum: Low Voltage and Limited Energy

Hello, A customer would like for me to run and terminate a 400' line of fiberoptic cable for him in his plant. Is this something that takes months...

i have had it. i just spent sunday evening certifying 100 nodes of 6E with a steam powered JDSU POS. this thing is so slow..... to write to...

Here's my problem, I replaced a buzzer style door chime with a regular chime because the client hated the sound. Now when the button is pushed the...

So I need some help figuring this out. How do the fire hat, priamary recall, alternate recall, and shunt trip modules get tied into the elevator...

I've recently started bidding new fire alarm work in a city, until recently, we only did contract service work. They have local amendments to the...

A customertoday askedme what the voltage rating on our landscape cable is. I started saying 30v and he said/questioned 120volts. I said no way, not...

How does this set up work? Elevator guys states I do not need a fused disconnect with aux contacts for shunt trip as there is already a disconnect...

This is my take: Class 1 power limited, Class 2, and Class 3 remote-control and signaling Class 1 power limited, Class 2, and Class 3 that...

How many #6 DC wires can I fit in a 2" conduit? Do I have to de-rate the conductors in the same fashion I would AC power conductors?

Hi all, first time poster here. I'm working on a CCTV system for a client and I'm running into a request I haven't seen before, and I was hoping...

I am working with a panel builder and I need to find the code or standard that has an issue with bundling 120VAC power for motors (1hp @ 16 A) with...

I cannot find a reason to not add a flow switch in this situation: Existing mercantile single story type II construction. Appears to be built...

I caught wind of this recently. http://www.pullstationsafety.com/en-US/Pages/default.aspx

Hello, I am trying to find any USA requirement for exposed vs enclosed dc bus bar. I am inspecting a small rectifier from China that has exposed...

Hello, first post here, apologies if this is under the wrong subforum or otherwise out of bounds. I am installing datacom cabling for a new...

hi guys i ran 16awg wire for 12vdc led strip for under Cabinet an ect now my question i know with Ac current you have to derate to 70% if you have 8...

I'm working on a legislative policy for the state of Nebraska and need the NEC voltage level that separates utility 60 hertz retail power voltages...