Starter battery cable route to B2B

[Martynovo]

Does anyone know a relatively easy route for a new 6 AWG cable from starter battery to B2B next to EBL30. Existing one looks like 8 AWG. On Hymer ML560 2017. Only route I can see it out battery box then under chassis and back in again via leisure battery locker. I don't like the idea of external cable but may have to . Thanks

 

[PeterCarole29]

Putting it in flexible conduit would be sensible
What distance and size b2b

 

[StillGoing]

Could you use the existing cable between the starter and EBL30? What size B2B are you fitting?

 

[Martynovo]

Peter
B2B 50amps, straight line distance 1.5m but out and around if no internal route available up to 3.5m at guess
Martyn

 

[Martynovo]

Could you use the existing cable between the starter and EBL30? What size B2B are you fitting?

I think it's on the limits as B2B is 50amp. Hymer use part of double floor I have no access to and their run is about 1.5 to 3m.

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[ChrisL]

I think it's on the limits as B2B is 50amp. Hymer use part of double floor I have no access to and their run is about 1.5 to 3m.

Could you solder the new cable to the old cable and pull it through that way?

 

[Martynovo]

That's a thought! But potential for cable to be trapped is high and I could loose both. Wondering about a thin strong cord attached first so I could pull original back if larger diameter jammed. I'm assuming too twisty route for electricians rods.

 

[StillGoing]

Do let us know how you get on.

 

[Martynovo]

Could you use the existing cable between the starter and EBL30? What size B2B are you fitting?

A further question? Why do they have a 50amp fuse as standard on the cable if it is not rated that high. Is it just too close to run a 50amp B2B on a 50amp fuse?

 

[Cush]

I would have thought that if you had it in a protective conduit as mentioned above and you ran it “above” cross members using clips and cable ties it should be fine. Don’t think distance will be a problem. You could always go up to 16mm2

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[StillGoing]

A further question? Why do they have a 50amp fuse as standard on the cable if it is not rated that high. Is it just too close to run a 50amp B2B on a 50amp fuse?

Check out this post

Wiring in new Victron B2B?

 

[Martynovo]

I'm afraid not, couldn't afford it. Renogy 50amp with MPTT I bought 18 months ago when not so informed, but due personal reasons never installed it.

 

[Lenny HB]

Check out this post

Wiring in new Victron B2B?

Thanks saved me posting.

 

[StillGoing]

I'm afraid not, couldn't afford it. Renogy 50amp with MPTT I bought 18 months ago when not so informed, but due personal reasons never installed it.

The information about cabling and fuses in that Victron post, is still applicable.

 

[Just smiffy]

I got underneath and cable in conduit from vehicle battery box to back of the van cable tied up, works a treat 30 mins job…

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[Bobbejaan]

That's a thought! But potential for cable to be trapped is high and I could loose both. Wondering about a thin strong cord attached first so I could pull original back if larger diameter jammed. I'm assuming too twisty route for electricians rods.

You might find it worthwhile to get one of these "LIDL Drain Snakes" :-
(EXAMPLE) ===

Parkside 3m Drain Cleaner Clears Blockages From Clogged Pipes No Chemicals | eBay

• Clears blockages from clogged pipes - no need for chemicals. • Claw end - simply crank the handle to clear blockages. • Length: 3m. • Tube made from zinc-coated spring steel.

www.ebay.co.uk

LIDL do them every few months in their "Middle of LIDL" section @ about £4 to £5.

I have found them to be invaluable for feeding through cables and the like both in the Tardis and around the house (after grinding down the claw/hook end to a rounded-point). ... They are VERY strong and stiff-yet-flexible and LIDL do them in both 3 metre and 5 metre long versions and the "winding handle" is useful as it allows you to "twist/wind" the rounded-point to different poke-angles in order to find an easier route/path.

=======================

P.S. === Found alternative longer (7 metre) similar versions at @ nice & cheap £ 6.95 here :-

7 mDrain Cleaner Spring Wire Waste Pipe Sink Snake Plumber Unblocked Tool | eBay

<p>7 m Drain Cleaner Spring Wire Waste Pipe Sink Snake Plumber Unblocked Tool. </p>

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==================

PPS === I forgot to mention that I use a few wraps of "self-amalgamating tape" (like used for Sat-Dish LNB sealing) to tie the Cable to the Snake end/head as it grips-like-shit and is much less likely (compared to ordinary insulating tape) to let the cable slip off the end of the snake whilst pushing or pulling.

 

[Martynovo]

Thanks everyone, excellent advice, so I have a plan! The existing run appears to be 2m so on Lenny's advice that's just acceptable and easy. However I'm going to keep a watch on cable temperature and if it appears to be warming then I will take an external route in Flexi conduit using 4AWG. In the long term as a winter job when I have time I will probably do that anyway. I'm also buying one of those Flexi rods as I have other wiring tasks that would benefit.