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Old 04-07-2016, 05:19 AM   #1
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Default Wiring advice Underwater Lights

First time poster looking for advice on my install. I have (4) seablaze x underwater lights I want to install on two switches. I will run from an fuse block two separate wires to each switch (12ga wire.) I will have each switch fused from the fuse block with a 10amp fuse. From the switch I will run each wire to two separate fuse blocks near the transom 2 lights per fuse block to control both lights with one switch. I will again use 12ga wire. This distance is roughly 25ft with 50 ft total run. I will use 16ga wire to connect each of the four lumitec lights (2 lights per fuse block) with a 5amp fuse. I used 10% voltage drop for my wire calculations. Would 10% be sufficient or should I use 3%? All input welcome

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Old 04-07-2016, 07:26 AM   #2
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Originally Posted by Summer Madness View Post
First time poster looking for advice on my install. I have (4) seablaze x underwater lights I want to install on two switches. I will run from an fuse block two separate wires to each switch (12ga wire.) I will have each switch fused from the fuse block with a 10amp fuse. From the switch I will run each wire to two separate fuse blocks near the transom 2 lights per fuse block to control both lights with one switch. I will again use 12ga wire. This distance is roughly 25ft with 50 ft total run. I will use 16ga wire to connect each of the four lumitec lights (2 lights per fuse block) with a 5amp fuse. I used 10% voltage drop for my wire calculations. Would 10% be sufficient or should I use 3%? All input welcome

Summer Madness
What is the current draw per light fixture? Per circuit?
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Old 04-07-2016, 07:53 AM   #3
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What is the current draw per light fixture? Per circuit?
Hi Buoy Scout

Each light draws 5amp and 2 lights per circuit

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Old 04-07-2016, 08:36 AM   #4
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10% voltage drop is probably fine for LEDs. 20A is generaly the the max for a 12ga circuit. But it sounds like you are running two 12ga circuits with two lights per circuit then splitting it at the transom with additional fuses. I don't think you need to do that. Just run the 12g wires to the lights. The fuse at the origination fuse block will protect the wiring.
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Old 04-08-2016, 08:15 PM   #5
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[QUOTE=Buoy Scout;8903504]10% voltage drop is probably fine for LEDs. 20A is generaly the the max for a 12ga circuit. But it sounds like you are running two 12ga circuits with two lights per circuit then splitting it at the transom with additional fuses. I don't think you need to do that. Just run the 12g wires to the lights. The fuse at the origination fuse block will protect the wiring.[/QUOTE

Thanks Buoy for the suggestion. The
reason for the two fuse blocks was I have read on this site and others that each Seablazex should have its own fuse. Also I contacted lumitec and they recommend 3% vol drop go figure

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