Wiring 4 wires to one lampholder

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duttonbrown

Lighting Designer
Location
Minneapolis, MN, USA
Occupation
Product Engineer, Lighting Designer
Hi, I'm working to create a fixture with a slim modern shape that uses 4 sockets/lampholders on 4 separate arms. One option for joining several lampholders in a fixture like this is to use a central compartment where I connect the wires inside the compartment with wire nuts, but I don't want to use such compartments because they look bulky. For that reason I have to use different methods to wire within the fixture rods.


I have a quick diagram below. We can only fit so many wires inside a rod, so if we try to wire all the sockets individually (see bottom illustration), there isn't enough room to run the 8 wires back to the supply wire. If we had more room, we could also splice the wires internally, but given the small size/length of the pipes, this is also a challenge. The solution has been to add two wires to each side of a socket so we are able to have fewer wires to the supply (4 instead of 8) as in the top illustration below. Is this an ok practice? See attached picture of how the socket looks when wired.

Thank you. - Thomas
 

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Hi, I'm working to create a fixture with a slim modern shape that uses 4 sockets/lampholders on 4 separate arms. One option for joining several lampholders in a fixture like this is to use a central compartment where I connect the wires inside the compartment with wire nuts, but I don't want to use such compartments because they look bulky. For that reason I have to use different methods to wire within the fixture rods.

Why not solder up a custom-fit wire assembly for it?
 
Your picture of the socket will likely work without any problems. But you still have to address the above question to be right.

Thank you all so much for your advice. Yes, I've checked with the listing which states the lampholder is meant to accommodate 16 or 18 gauge wire. It doesn't say how many, but I'd assume it means one. I will check specifically with the manufacturer. Until I can verify, I will use the method suggested by ceknight to make a custom fit wire. Thank you again everyone!
 
Thank you all so much for your advice. Yes, I've checked with the listing which states the lampholder is meant to accommodate 16 or 18 gauge wire. It doesn't say how many, but I'd assume it means one. I will check specifically with the manufacturer. Until I can verify, I will use the method suggested by ceknight to make a custom fit wire. Thank you again everyone!

Crimp a fork terminal to the "two-fered" wires, and place the fork under the screw.

http://www.delcity.net/images/photos/450px/462065_primary_450px.jpg

Still technically outside the listing of the terminal (I believe) but two 18ga wires twisted together more or less equal a 14ga wire, and I can't see the crimp knowing the difference. Just make sure the insulation of both wires is within the "blue" part of the fork.


SceneryDriver
 
Aha! This is a nice solution. It is certainly more acceptable than cramming in two 18 gauge wires and easier than soldering two together. Thank you for your time.

Crimp a fork terminal to the "two-fered" wires, and place the fork under the screw.

http://www.delcity.net/images/photos/450px/462065_primary_450px.jpg

Still technically outside the listing of the terminal (I believe) but two 18ga wires twisted together more or less equal a 14ga wire, and I can't see the crimp knowing the difference. Just make sure the insulation of both wires is within the "blue" part of the fork.


SceneryDriver
 
Crimp a fork terminal to the "two-fered" wires, and place the fork under the screw.

http://www.delcity.net/images/photos/450px/462065_primary_450px.jpg

Still technically outside the listing of the terminal (I believe) but two 18ga wires twisted together more or less equal a 14ga wire, and I can't see the crimp knowing the difference. Just make sure the insulation of both wires is within the "blue" part of the fork.


SceneryDriver

FYI: If you're submitting your assembly for listing, you need to make sure that connector is listed for use in that fashion. Otherwise you're going to have to pay for the testing and evaluation to see if that connector can be used in that fashion, and that can get very expensive. Alternatively you can find another connector which accomplishes the objective which is approved for that use.
 
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