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Reviews Section => Accessories & Miscellaneous => Topic started by: chris.bailey on 09:55:03, 02 March, 2017

Title: Power Cabling
Post by: chris.bailey on 09:55:03, 02 March, 2017
Those who know me will attest to the fact that I have slight OCD leanings regarding cabling but, I believe, for good reason. Poor cabling can easily affect tracking and in the worst case can cause snags, especially when doing a flip slew. I have hunted high and low for a high quality two core cable in the sort of diameter that suits our requirements. After a lot of false starts I think I have found the ideal astro power cable.

http://www.designacable.com/components/cable/twin-conductor-silicone-rubber-cable-2x0-4mm-6amp-suitable-for-dc-applications.html (http://www.designacable.com/components/cable/twin-conductor-silicone-rubber-cable-2x0-4mm-6amp-suitable-for-dc-applications.html)

Being Silicone jacketed it is slippery and difficult to kink and stays like that even at cold temperatures (I tested by putting a run in the freezer). Its light weight but carries 6 Amps, so plenty for our normal power loads, even allowing for 2x overhead. Its diameter JUST fits in the 12v power plugs that typically fit mounts and cameras. Its not exactly cheap but for the most part we are only looking to make up a handful of 2m maximum runs so it doesn't work out too badly.

Well worth checking out next time you are doing some DIY power cables.

Chris
Title: Re: Power Cabling
Post by: Roger B on 13:00:09, 02 March, 2017
Off topic a bit Chris,  but this has just reminded me of a power problem I have,     

The home made box I have ( Seen at Kelling )     If I power this up via the 12v power supply I have used for years without problems I get a power drain, when all connected.    Mount/two cameras/dew heaters/focuser you can see the power light on the EQ6 flash & a low power light on the dew heater supply)  but if I power up a 4 way cigarette outlet using the same power supply I don't. 

Any reason ?     Electrics are not my strong point.


Rog
Title: Re: Power Cabling
Post by: chris.bailey on 14:07:07, 02 March, 2017
Rog

Probably something to do with the wiring in the home made box. A piccy of the inside might help. How long a lead have you got attached to it?

Chris
Title: Re: Power Cabling
Post by: Roger B on 15:41:35, 02 March, 2017
I'll get back to you on that one Chris.     Working for the next 4 days

Rog
Title: Re: Power Cabling
Post by: Bazzaar on 16:22:38, 02 March, 2017
Good call Chris, infinitely better than standard plastic covered cable.
For people who have to set up and pack away every session this stuff will cope better with constant handling, rolling out, coiling up etc.
Ideal for star party/dark site kit.

Baz
Title: Re: Power Cabling
Post by: steveg4iwr on 19:42:01, 02 March, 2017
Good evening Chris. This cable looks great. What length does it come in as they don't mention that. Steve


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Title: Re: Power Cabling
Post by: ChrisLX200 on 20:29:11, 02 March, 2017
Good evening Chris. This cable looks great. What length does it come in as they don't mention that. Steve


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It is good - I've been looking for 2-core silicone wire myself and whilst single-core is easy to find multi-core is rare. It's sold by Meter (back up a page to discover that). Same firm also sell it on Ebay at higher cost (to cover Ebay fees no doubt). We should have got together for a multi-buy but anyway, I have ordered 20M now.

ChrisH
Title: Re: Power Cabling
Post by: chris.bailey on 22:26:16, 02 March, 2017
What length does it come in as they don't mention that. Steve

As ChrisH notes, its sold by the metre. I bought a couple of metres as a trial but have since ordered 30.

There are other two core silicone cables (I have several samples) but most of them have very heavy jackets and thus have a diameter that makes termination difficult OR are for much higher power applications so too stiff.
Title: Re: Power Cabling
Post by: Nomis Elfactem on 22:41:21, 03 March, 2017
20 meters ordered !!

One of my jobs (you'll be pleased to hear Chris) is to sort out all my wiring... this will hopefully spur me on to do it now !

S.
Title: Re: Power Cabling
Post by: Uplooker on 00:00:21, 04 March, 2017
There is actually a supplier,albeit in Norway, that sells 100m reels for less than £100. I will find the link and post


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Title: Re: Power Cabling
Post by: chris.bailey on 09:55:32, 04 March, 2017
Be warned that the cable is a VERY tight fit in the 2.1 x 10 x 5.5 DC power connector strain relief glands. Thats a good thing when fitted but a little frustrating to make. I have found gently warming everything and the judicious application of a little grease helps get the cable through but don't be tempted to try and screw it back together or the little cable connections in the plug will twist and short. Best to just push the plastic and metal parts back together and ride over the thread.

ps these https://www.bitsbox.co.uk/index.php?main_page=product_info&cPath=225_232&products_id=1688&zenid=03k3u9thus636gjticdrjlr123 (https://www.bitsbox.co.uk/index.php?main_page=product_info&cPath=225_232&products_id=1688&zenid=03k3u9thus636gjticdrjlr123) are the ones I have been using and are sturdier than many.

These http://www.ebay.co.uk/itm/12V-Motorcycle-Marine-Quality-Twist-n-Lock-Accessory-Power-Plug-8A-max-/291171331824?hash=item43cb29eef0:g:uX0AAOSwDk5T~t33 (http://www.ebay.co.uk/itm/12V-Motorcycle-Marine-Quality-Twist-n-Lock-Accessory-Power-Plug-8A-max-/291171331824?hash=item43cb29eef0:g:uX0AAOSwDk5T~t33) are about as cheap as I have found the splash-proof plugs though they do have green LEDS and its a fiddly job to change them over to red ones.
Title: Re: Power Cabling
Post by: jhughe22 on 10:42:55, 04 March, 2017
Cracker find Chris, i'll bear this in mind when i get back to astro imaging.. :thumbup:
Title: Re: Power Cabling
Post by: Skipper Billy on 11:53:20, 04 March, 2017
Be warned that the cable is a VERY tight fit in the 2.1 x 10 x 5.5 DC power connector strain relief glands. Thats a good thing when fitted but a little frustrating to make. I have found gently warming everything and the judicious application of a little grease helps get the cable through but don't be tempted to try and screw it back together or the little cable connections in the plug will twist and short. Best to just push the plastic and metal parts back together and ride over the thread.

ps these [url]https://www.bitsbox.co.uk/index.php?main_page=product_info&cPath=225_232&products_id=1688&zenid=03k3u9thus636gjticdrjlr123[/url] ([url]https://www.bitsbox.co.uk/index.php?main_page=product_info&cPath=225_232&products_id=1688&zenid=03k3u9thus636gjticdrjlr123[/url]) are the ones I have been using and are sturdier than many.

These [url]http://www.ebay.co.uk/itm/12V-Motorcycle-Marine-Quality-Twist-n-Lock-Accessory-Power-Plug-8A-max-/291171331824?hash=item43cb29eef0:g:uX0AAOSwDk5T~t33[/url] ([url]http://www.ebay.co.uk/itm/12V-Motorcycle-Marine-Quality-Twist-n-Lock-Accessory-Power-Plug-8A-max-/291171331824?hash=item43cb29eef0:g:uX0AAOSwDk5T~t33[/url]) are about as cheap as I have found the splash-proof plugs though they do have green LEDS and its a fiddly job to change them over to red ones.


Just seen that the plugs linked to at BitBox are only rated at 1amp at 12 volts - maybe OK but might be a bit borderline for a slewing mount??
Title: Re: Power Cabling
Post by: chris.bailey on 13:01:48, 04 March, 2017
Billy

All of those plugs have much the same internals in terms of connector gauges so why those are listed as 1amp I don't know. I have some listed as 3 amp which are identical internally (probably all made in the same factory in China). The Bitsbox ones have a more 'robust' jacket than several others I have bought that don't stand up to a squeeze test.

Chris
Title: Re: Power Cabling
Post by: ChrisLX200 on 13:44:02, 04 March, 2017
I was looking for something that was a bit more secure and found these locking types:

This one has a screw connector but needs the matching threaded socket. OK for new panel installations though
https://www.amazon.co.uk/d/Computers-Accessories/Lockable-5-5mmx2-1mm-Socket-Female-Connector/B00P0BQKBC/ref=sr_1_1?ie=UTF8&qid=1488628989&sr=8-1&keywords=2.1mm+dc+power+plug+lockable (https://www.amazon.co.uk/d/Computers-Accessories/Lockable-5-5mmx2-1mm-Socket-Female-Connector/B00P0BQKBC/ref=sr_1_1?ie=UTF8&qid=1488628989&sr=8-1&keywords=2.1mm+dc+power+plug+lockable)

Can't figure this one - there don't appear to be any matching sockets listed anywhere so I'm not sure how they're supposed to work..
https://www.amazon.co.uk/d/Power-Current-Equipment/2-1MM-DC-PLUG-LOCKABLE-PPW01008-PRO-POWER/B0118K5I7A/ref=sr_1_2?ie=UTF8&qid=1488629477&sr=8-2&keywords=2.1mm+dc+power+plug+lockable (https://www.amazon.co.uk/d/Power-Current-Equipment/2-1MM-DC-PLUG-LOCKABLE-PPW01008-PRO-POWER/B0118K5I7A/ref=sr_1_2?ie=UTF8&qid=1488629477&sr=8-2&keywords=2.1mm+dc+power+plug+lockable)

ChrisH
Title: Re: Power Cabling
Post by: Skipper Billy on 16:23:47, 04 March, 2017
On the site that has the silicone cable they have good quality ready made (with silicone wire) power leads - you can even have a custom label !! Rated to 6 amps.

http://www.designacable.com/digital-slr/dc-power-leads/2-1mm-dc-patch-lead-switchcraft-plugs-silicone-cable-guitar-fx-pedal-power.html (http://www.designacable.com/digital-slr/dc-power-leads/2-1mm-dc-patch-lead-switchcraft-plugs-silicone-cable-guitar-fx-pedal-power.html)



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