I'm not sure I understand why you want to splice anything so I'll describe the most common cable looms I've seen for
power &
DMX to
LED's and see if that would work for you, if not tell us why.
The looms are usually
fed by one
line of
power due to
LED's low draw.
Power is daisy chained down the
line from
fixture to
fixture in what if you took it out of the
loom would look like one really long cable with a lot of female connectors spaced out as you go down the
line. As ship has mentioned before in other threads there are connectors specifically made to have two cables going through the
strain relief (one 3
conductor cable in and one out). Sadly it's not very common to see them actually used in this type of application.
DMX also daisy chains, but because you shouldn't splice
DMX and the fact that most
LED fixtures have both a
DMX in and out you see an individual
jumper go along with the
power to jump from
fixture to
fixture. You take all this cable and tape it together so that the
loom runs along and at each
fixture there are 4 lines that
drop down with a total of 3 connectors per
fixture (
power in and out going into one
connector and individual data in and out cables). This runs along until you get to the end were there is only
power in and data in for the last
fixture and hopefully you remember to use a
terminator in that
fixture.
A few random thoughts about this style of
loom:
- It's minimizes failure points, but because power is daisy chained a problem in one connector can drop power to the fixtures down the line.
- It's a matter of preference how close to the fixture the power connector goes. Some people like it down by the end of the DMX cables, others like it a bit higher up so you don't have to cable manage the power tail coming from the fixture.
- If your fixtures take an IEC or other type of connector that you can't rewire with both an in and an out it's not uncommon to see an appropriately rated intermidiate connector (like a NEMA L5-15R) wired into the loom and then a short jumper running from that connector down the the light. It adds failure points, but is easier to maintain than crimps or soldering.
There are some weak spots to this style of
loom, but it's the most common thing I've seen used. Lastly no matter what you do I recommend
friction tape for taping ANY cable
loom. It leaves less residue, holds just as well as
e-tape if not better, and is easier to remove if you need to replace a damaged cable.