Shoreline fridge- no power connectors - advice please

[WotEver]

4 minutes ago, Jen-in-Wellies said:

The mm square vs square mm confusion can be easily got round by using a unit of area for conductor measurement, rather than a linear unit. I propose an imperial unit to keep the crustier forum members happy. The nanoAcre.

 

1nanoAcre = 4.0469mm²

or 1mm² roughly equals 1/4 nanoAcre.

 

Jen

Perfect. So for each metre that a fridge run is from the batteries you require 0.25nA. I second your proposal. 

[Murflynn]

Jen - that is brilliant: please approach the cable supply industry and lobby them without delay. .... or perhaps you should be rigorous and go for 1 nanoHectare = 10mm2

Edited July 22, 2019 by Murflynn

[MtB]

Did i not earlier in the thread propose using hectares??!

 

 

[WotEver]

14 minutes ago, Mike the Boilerman said:

Did i not earlier in the thread propose using hectares??!

Yes you did, but that was just silly. 

 

Rethinking the nomenclature I think nA is confusing as it could be confused with current. I propose nAc. 

[Murflynn]

2 hours ago, WotEver said:

Yes you did, but that was just silly. 

 

Rethinking the nomenclature I think nA is confusing as it could be confused with current. I propose nAc. 

but we are dealing with  DC here.

[Alan de Enfield]

3 hours ago, Jen-in-Wellies said:

The mm square vs square mm confusion can be easily got round by using a unit of area for conductor measurement, rather than a linear unit. I propose an imperial unit to keep the crustier forum members happy. The nanoAcre.

 

1nanoAcre = 4.0469mm²

or 1mm² roughly equals 1/4 nanoAcre.

 

Jen

What fraction of a1mm² would a NanoNano (also called a Mork) be ?

 

 

 

[WotEver]

32 minutes ago, Alan de Enfield said:

What fraction of a1mm² would a NanoNano (also called a Mork) be ?

A very small one of course. 

[JohnB]

To answer the connection question for differing size cables.

 

How about "line taps"

Try TLC  part BH S16 or S25/35

https://www.tlc-direct.co.uk/Main_Index/Cable_Accessories_Index/Line_Taps/index.html

 

 

 

Sorry, it's getting back on topic.....

[dor]

Not sure why there is such a problem with this.  I used a large choc block which fitted the fridge tails, and doubled over the 6mm^2  into the other side of the choc block.

 

Fitted it twelve years ago and it is as solid now as it was then.  No problem with voltage drop, less than 0.2V difference to breaker over about 6 metres.

[MtB]

2 minutes ago, dor said:

Not sure why there is such a problem with this.  I used a large choc block which fitted the fridge tails, and doubled over the 6mm^2  into the other side of the choc block.

 

Fitted it twelve years ago and it is as solid now as it was then.  No problem with voltage drop, less than 0.2V difference to breaker over about 6 metres.

 

 

Choc blocks are bodgetastic!!

 

 

 

[nicknorman]

12 minutes ago, Mike the Boilerman said:

 

 

Choc blocks are bodgetastic!!

 

 

 

Well, choc blocks with ferrules, not in a hostile environment, are fine for 12v DC

[MtB]

1 minute ago, nicknorman said:

Well, choc blocks with ferrules, not in a hostile environment, are fine for 12v DC

 

Possibly, but for joining two widely differing cable sizes till seems like a bodge.

 

What would be used on an aircraft?

 

 

[Ryeland]

A good way of using a choc block with different sized cables is to use one capable of taking both cables together. Strip enough on both cables so that they sit under both screws, with the smaller one trapped under the larger.

Richard

[Murflynn]

24 minutes ago, Ryeland said:

A good way of using a choc block with different sized cables is to use one capable of taking both cables together. Strip enough on both cables so that they sit under both screws, with the smaller one trapped under the larger.

Richard

..... ferrules are required by RCD (as implied by Nick) - a large ferrule to include the tails of both the thick and the thin cable, trapped in a choc block - what's not to like?

[WotEver]

51 minutes ago, Murflynn said:

..... ferrules are required by RCD (as implied by Nick) - a large ferrule to include the tails of both the thick and the thin cable, trapped in a choc block - what's not to like?

See post #36. 

[nicknorman]

3 hours ago, Mike the Boilerman said:

 

Possibly, but for joining two widely differing cable sizes till seems like a bodge.

 

What would be used on an aircraft?

 

 

I can’t think of a situation where cables of widely differing sizes would need to be joined directly. Normally it would be done via a bus bar of some sort.

[MtB]

10 minutes ago, nicknorman said:

I can’t think of a situation where cables of widely differing sizes would need to be joined directly.

 

What? You don't ever have Shoreline fridges in helicopters to keep the pilot's beer cold?? ?

 

 

[nicknorman]

8 minutes ago, Mike the Boilerman said:

 

What? You don't ever have Shoreline fridges in helicopters to keep the pilot's beer cold?? ?

 

 

24v electrics so we just use thin wires to get 12v at the fridge.

[jonathanA]

On 22/07/2019 at 18:54, dor said:

Not sure why there is such a problem with this.  I used a large choc block which fitted the fridge tails, and doubled over the 6mm^2  into the other side of the choc block.

 

Fitted it twelve years ago and it is as solid now as it was then.  No problem with voltage drop, less than 0.2V difference to breaker over about 6 metres.

Me neither soldering iron and heat shrink...

 

job done 

[Stephen Jeavons]

I bought one of those DC clamp meters touted in another thread. Like a kid with a new toy, I went around looking what everything was drawing. It was interesting to see that, as I'm on shore power, the Victron carries all the load. My fridge and freezer each drawing around 4 amps when running, and the main water pump about 15 amps. Batteries remain on trickle the whole time (0.6 amp). They only seem to kick in when the Inverter wakes up.  

[AndrewIC]

On 22/07/2019 at 11:18, Murflynn said:

pity Shoreline couldn't provide something like that in the first place - unless, as I suspect, the fridge isn't new and someone has snipped off the cables.

I bought a new shoreline a year or two ago. It came with wire tails as per the OP’s picture. The tails terminated on the compressor control unit with crimped female spade connectors.

[WotEver]

2 hours ago, AndrewIC said:

I bought a new shoreline a year or two ago. It came with wire tails as per the OP’s picture. The tails terminated on the compressor control unit with crimped female spade connectors.

So you threw them away, crimped some nice new spade terminals to the feed cables and connected them direct, thereby eliminating one more connection. Yes?

[AndrewIC]

1 minute ago, WotEver said:

So you threw them away, crimped some nice new spade terminals to the feed cables and connected them direct, thereby eliminating one more connection. Yes?

No, the feed cables are slightly too short ?. Yellow butt splice crimps, replacing a very old and dodgy choc block. I did briefly consider a couple of terminal posts on the wall and a new length down to the fridge, it’s on the “one day” list....

[WotEver]

7 minutes ago, AndrewIC said:

No, the feed cables are slightly too short ?. Yellow butt splice crimps, replacing a very old and dodgy choc block. I did briefly consider a couple of terminal posts on the wall and a new length down to the fridge, it’s on the “one day” list....

I saw some round tuits for sale in Blackpool a few years ago, they may still have some. 

[AndrewIC]

13 minutes ago, WotEver said:

I saw some round tuits for sale in Blackpool a few years ago, they may still have some. 

One of the pole racks I made about 15 years ago as a temporary measure fell apart rotten last month ?