Cables should be same length....but one is a half inch off (problem or no?)

Guy who made my negative cables for our MPPT that will deliver 200A at 48V to the bus ended up a little short on one of them. Half inch shorter than the other. He said it wouldn't be a big deal. I'm going to end up taking one back and getting it replaced because he put the lugs 180 out on the two ends of one of the cables, so I'll have him make the new one match the length of the other more closely.

But I'm curious if that half inch would be an issue or not. Thoughts?

Won’t make a bit of difference

Don't worry about it.

1/2" won't be a big deal in real life.

What is the cm2 or awg of the cable? A volt drop can be calculated but it'll be difficult to tell in 1/2"...

Blue and black wires all going to ground bus bar?

Brett V said:

Won’t make a bit of difference

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That big all exposed metal ratchet scares me a bit pared next to all that 4/0 cable…

Supervstech said:

That big all exposed metal ratchet scares me a bit pared next to all that 4/0 cable…

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It doesn’t look like he’s using the positive side of the bus bar. But if anything gets added to the bottom half where the positives go, yeah… a good heat shrink on the socket would be prudent.

Supervstech said:

What is the cm2 or awg of the cable? A volt drop can be calculated but it'll be difficult to tell in 1/2"...

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1/0 cables

Supervstech said:

That big all exposed metal ratchet scares me a bit pared next to all that 4/0 cable…

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Good point. No power on the bus bar, no components turned on, but now is probably a good time to break the habit of just letting things lay around...

HarryN said:

Blue and black wires all going to ground bus bar?

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Those are the two negative cables going to the Quattro inverter.

AlaskanNoob said:

Good point. No power on the bus bar, no components turned on, but now is probably a good time to break the habit of just letting things lay around...

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Since I work around mobile power systems quite a bit, I wrap my tools with electrical tape. It does not solve all problems but it reduces the risk at least some and is very low cost. There are a a handful that get used the most, so I color code those sizes with the tape colors since the labels get covered.

For example - in the marine battery world, it is common for the (+) terminal to be 10mm or the near US equivalent, so the socket and wrenches that match I tape with red. The (-) terminal is commonly 8mm, so I tape the matching tools with black.

I have some taped with blue, orange, white and yellow - which also helps me find things faster in general.

The real pro power company electricians use insulated tools and they are obviously better but out side of my budget.