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relay

  1. Commercial Electrical Forum
    Hello, Just reaching out to see if anyone can help me out. I am doing controls and I am wiring a RIBU1C to a motor starter. The print is telling me to take the coil 10-30 vac/vdc (white/blue) lead to the 10-30 vac/vdc. Take the coil common (wht/yellow) to the coil common. Does anyone know what...
  2. Lighting Design
    Hey guys, I have an issue I've been trying to figure out myself for quite a while now but can't seem to find a solution. I also havent had any professional schooling (other than like 1 electrical engineering course) and am otherwise just self taught. Here we go: Just for reference this has to...
  3. Commercial Electrical Forum
    Hi there, I have this control module. Its a 120v ac input that puts out 24v ac. Its from a big stand alone commercial freezer. Not to sure how to test the contacts (NO and NC) from the relay. I tried all sorts of combinations with my meter but could not get voltage during any combination. Any...
  4. General Electrical Discussion
    For a relay having a single 87 port, rated at 40A and 12V, would splicing the wire leaving the 87 port into 2 wires to connect to 2 x 12V loads overpower the relay and kill it? The current being drawn from the 2 loads is well under 40A combined--so that is not the problem. This set-up resulted...
  5. Commercial Electrical Forum
    We installed some fans for a customer with a speed control for them, all worked fine. The customer then asked for them to be put on a timer so they could be set to run for a few hours and then shut off. We installed a 30A clapper relay before the speed controllers that was controlled by a...
  6. NEC Code Forum
    Regarding relays and contactors, is there anything in the NEC that says the low power coil control and the high power, controlled, contacts must be on the same circuit? I searched my 2014 NEC.pdf for "relay" and "contactor" and found no such rule. Thanks
  7. Residential Electrical Forum
    I've been trying to figure out how to wire a switch to operate the lights at my front gate. I have constant power at the gate, which comes in on 260' of 12-2 copper from a sub panel. (I haven't laid the wire yet, so could possibly go up to 10-2 if you guys think it's needed.) My house is another...
  8. Vintage Electrical
    I am working in a house with GE RR3 relays used in lighting circuits. I expected these circuits to be similar to 3-Wire motor start / stop stations. However, I found that the rocker switch, used with the relay, uses normally open, momentary contacts for both on and off. I expected a normally...
  9. General Electrical Discussion
    Hello, does anyone know what this symbol means? Its a current transformer with a 50g relay connected to some 11.5kv substation conduit. It has a couple of 50/51 relays upstream of it (not shown). I do not know what the lines going through the CT meen, does it meen that it is zero sequenced?
  10. General Electrical Discussion
    I was wondering what the difference is between 51G, 51Gs, and 51N Relays? In addition, how do they relate to current transformers (How could you tell which is which based on a schematic of a power system or other ways)?
  11. PLCs, VFDs, Motors and Controls
    Hi. I am new to this board and reaching out for help with an electrical application. I am not an electrician by trade, have some background, but am reaching my limits with this one. Please forgive me if I am posting this in the wrong section or if my question is off-topic. I have two LED signs...
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