Good mail order place for battery cables? - Page 3 - SailNet Community
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post #21 of 35 Old 12-10-2013
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Re: Good mail order place for battery cables?

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Is a fuse near the battery worth adding? Right now there's nothing.
Maxwell required a circuit breaker or fuse within 60" of the cable connection to the battery. The closer the better in my view. If you're worried about the fuse block becoming wet, pick up a waterproof plastic box with a removable cover from the electrical department at Lowes or Home Depot and place your fuse block in that. A little silicon around the cable at the box entry tubes seals it up nicely. I have been using such boxes for mounting terminal blocks on our boats for many years but rarely see them on other boats. They protect and keep the terminal blocks and wires and connectors dry and clean with far less or no corrosion.

FWIW...

"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
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post #22 of 35 Old 12-10-2013
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Re: Good mail order place for battery cables?

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Originally Posted by svHyLyte View Post
Maxwell required a circuit breaker or fuse within 60" of the cable connection to the battery. The closer the better in my view. If you're worried about the fuse block becoming wet, pick up a waterproof plastic box with a removable cover from the electrical department at Lowes or Home Depot and place your fuse block in that. A little silicon around the cable at the box entry tubes seals it up nicely. I have been using such boxes for mounting terminal blocks on our boats for many years but rarely see them on other boats. They protect and keep the terminal blocks and wires and connectors dry and clean with far less or no corrosion.

FWIW...
Ideally your batteries would not be in a wet location. An ANL, Class-T or MRBF fuse are all suitable for battery bank fusing..

House battery bank fusing, within 7" of the positive post, is an ABYC requirement that many insurance companies are now requiring during insurance surveys. Fusing the start bank on a small sailboat AUX is also a wise idea...

I have had a few customers who needed to install bank fusing, among other items, to continue insurance coverage.

I use job Velleman job boxes frequently:

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post #23 of 35 Old 12-10-2013 Thread Starter
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Re: Good mail order place for battery cables?

I found an old thread on the Blue Sea Systems 5191, which fits directly to the battery terminal.

Looks like it would work great for my application.

MRBF Terminal Fuse Block - 30 to 300A - Blue Sea Systems

Bristol 31.1, San Francisco Bay
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post #24 of 35 Old 12-10-2013
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Re: Good mail order place for battery cables?

Dunno, Maine, I think you're cutting corners in your old age.

Not that I haven't been known to do the same thing, but I was taught that IF water can follow a cable, you run the cable into the BOTTOM of the box, with a drip loop, so even if water runs "down" the cable it will always run down and out away from the box, never down into it.

Standard telco practice from the Western Electric / AT&T Longlines days, and I suspect from telegraphers before those.
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post #25 of 35 Old 12-10-2013
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Re: Good mail order place for battery cables?

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Originally Posted by hellosailor View Post
Dunno, Maine, I think you're cutting corners in your old age.

Not that I haven't been known to do the same thing, but I was taught that IF water can follow a cable, you run the cable into the BOTTOM of the box, with a drip loop, so even if water runs "down" the cable it will always run down and out away from the box, never down into it.

Standard telco practice from the Western Electric / AT&T Longlines days, and I suspect from telegraphers before those.
The big if is "IF", and it can't, unless water found a new way to go up-hill...

Those cables come from INSIDE the boat and originate from below the level of the box. You can see them trail off to the right. If that area gets doused from above I have WAY bigger problems than whether or not those are in a box.... The mast wiring that comes from the mast goes into the bottom and has a pre-drip loop.. Those boxes were more to prevent any shorting than water damage anyway... Boxes are not always used for water integrity....

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post #26 of 35 Old 12-10-2013
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Re: Good mail order place for battery cables?

My webcam was fuzzy, I couldn't tell those were well inside the boat.

I wouldn't put it past water to find a new and creative way to go uphill. Water can be persistent that way. (G)
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post #27 of 35 Old 12-10-2013
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Re: Good mail order place for battery cables?

I don't like using a Swage-It tool for this. The first time that I made a battery cable West Marine pointed me to their swaging crimper and said to use it. The crimps were not very good and it was easy to make them fail.

The better chandlery in Seattle did let me borrow their good quality crimping tool over night to make battery cables. They also sold higher end terminals than the Ancor ones that West Marine had. I had to pick up the tool as they were closing and return it as they were opening the next day. Spending Saturday night making battery cables wasn't the most exciting Saturday that I ever had, but now I know that they are done properly.

The Bluesea MBTF fuse holders that mount directly on the battery are great.

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post #28 of 35 Old 12-10-2013
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Re: Good mail order place for battery cables?

Quote:
Originally Posted by MarkSF View Post
I found an old thread on the Blue Sea Systems 5191, which fits directly to the battery terminal.

Looks like it would work great for my application.

MRBF Terminal Fuse Block - 30 to 300A - Blue Sea Systems
These Blue Sea direct-mount battery fuses are excellent - neat and simple! One word of caution (experience speaking here) - make certain that you have adequate vertical clearance inside your battery box/containment to handle the added height of the fuse assembly. Also, buy extra fuse elements just in case.
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post #29 of 35 Old 12-10-2013
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Re: Good mail order place for battery cables?

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...Buy the good tool from KL Jack and sell it here for $40.00 less when you are done. Someone will snap it up in a hear beat. In the end you are out $40.00 but will have better, neater wiring with more exact lengths of wire...
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Originally Posted by svHyLyte View Post
...Rather than a spacial tool for crimping wire, I used a Swage It Tool...
I am also rewiring my batteries, and decided on the KL Jack crimper ($170 w/ shipping). I need to do 22 crimps in total. Easy math $170/22=less than $8 per crimp.
If I sell it for $130 afterwards (which I am not) each crimp would then cost $1.88.
That was an easy decision.
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post #30 of 35 Old 12-11-2013 Thread Starter
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Re: Good mail order place for battery cables?

Well thanks for all the replies so far. This has been a most informative thread.

Bristol 31.1, San Francisco Bay
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