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Author Topic: Power Cabling  (Read 1414 times)

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Offline chris.bailey

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Power Cabling
« 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

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
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

Offline Roger B

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Re: Power Cabling
« Reply #1 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
Scopes - TS65q, W/O 110 Triplet
Mount - EQ6 PRO via  Eqmod,  Rowan belt modded
Cameras - SX694, QSI583WSG,Lodestar Guidecam, GP-Cam, QHY5II.
TS 9mm OAG
Quantum 7x1.25 EFW, Baader LRGB,Ha,OIII,SII Filters 
Quark chromo

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Offline chris.bailey

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Re: Power Cabling
« Reply #2 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
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

Offline Roger B

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Re: Power Cabling
« Reply #3 on: 15:41:35, 02 March, 2017 »
I'll get back to you on that one Chris.     Working for the next 4 days

Rog
Scopes - TS65q, W/O 110 Triplet
Mount - EQ6 PRO via  Eqmod,  Rowan belt modded
Cameras - SX694, QSI583WSG,Lodestar Guidecam, GP-Cam, QHY5II.
TS 9mm OAG
Quantum 7x1.25 EFW, Baader LRGB,Ha,OIII,SII Filters 
Quark chromo

SGPro, Pixinsight.

************AND NO TIME TO USE IT************

Offline Bazzaar

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Re: Power Cabling
« Reply #4 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
Tal 200k, SW 200P, iOptron iEQ45 pro, HEQ5 pro, QHY5III174m, QHY5L II mono, Samsung SBC 2001, SharpSky focuser, Zwo ADC,  Celestron 15x70 bins,

Offline steveg4iwr

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Re: Power Cabling
« Reply #5 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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Offline ChrisLX200

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Re: Power Cabling
« Reply #6 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
Chris Heapy - current: 10-Micron GM2000HPS-II U/P, G11/Gemini, TV NP127is, Altair 8" RC, TV Genesis SDF, TV Pronto, SW Equinox 80ED, 10" LX200, 12" f/5.4 Newt, Vixen 90mm.
Atik 490EX, Atik EFW, Baader LRGB filters, Astrodon 3nM NB filters, Lodestar, QHY5L-II all-sky, Canon 70D and 350D
Whirley Obs., MPC Code Z89

Offline chris.bailey

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Re: Power Cabling
« Reply #7 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.
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
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Offline Nomis Elfactem

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Re: Power Cabling
« Reply #8 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.
Simon

Scopes: Astro-Tech AT-111EDT Triplet, TS65ED Quad, Orion ST80, Modded PST-90 Solar Scope, PST Cak (on loan)
Cameras: SXVF H694, Atik 16ic, Canon EOS 600d, DMK41, DMK21, QHY 5L-II (mono & colour)
Accessories: SX USB Filter Wheel, SX OAG, Baader LRGB Ha SI OII Filters, SharpSky Focuser
Mount: EQ6 (EQMOD), SW Star Adventurer, plus a lot (and I mean a lot) of other bits and pieces

Offline Uplooker

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Re: Power Cabling
« Reply #9 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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Ian

Scopes: SW 150P Newt, ST80, Celestron C8 XLT, TAL 100RS / PST Stage 2 Mod & BF10, SW 300PDS (soon to be on a Dob Mount)
Cameras: SPC900, QHY5, Canon 450D, DMK31AU03.AS
Mounts: NEQ6 powered by EQMod, EQ3-2

Offline chris.bailey

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Re: Power Cabling
« Reply #10 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 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 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.
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

Offline jhughe22

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Re: Power Cabling
« Reply #11 on: 10:42:55, 04 March, 2017 »
Cracker find Chris, i'll bear this in mind when i get back to astro imaging.. :thumbup:
8" f/5 Sky-watcher 200P f=1000,  6" f/9 Ritchey-Chrétien Revelation Astro f=1370, 3.5" f/10 Meade 90 with 2" focuser mod f=900, 3.5" f/13 Maksutov-Cassergrain f=1200...  Heavy Duty EQ est-60lb payload.  iOptron Minitower v2, Skywatcher SupaTrak, and a damaged EQ-3 Mount. Latest;- EQ-5 with dual drive.
Camera's;- Nikon D5000, Sony Nex5, Samsung NX2000, Altair GPCAM AR0130C, Celestron NexImage SSI

Offline Skipper Billy

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Re: Power Cabling
« Reply #12 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 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 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??
Scopes - 130 Heritage, ES 208mm f3.9 Carbon Hex astrograph, SW ED80 and SW ST80 for guiding
Mount - Skywatcher AZ-EQ6-GT
Cameras - Cameras - Atik 460EX mono and Lodestar for guiding
Website www.davidbanksastro.com

Offline chris.bailey

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Re: Power Cabling
« Reply #13 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
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

Offline ChrisLX200

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Re: Power Cabling
« Reply #14 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

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

ChrisH
Chris Heapy - current: 10-Micron GM2000HPS-II U/P, G11/Gemini, TV NP127is, Altair 8" RC, TV Genesis SDF, TV Pronto, SW Equinox 80ED, 10" LX200, 12" f/5.4 Newt, Vixen 90mm.
Atik 490EX, Atik EFW, Baader LRGB filters, Astrodon 3nM NB filters, Lodestar, QHY5L-II all-sky, Canon 70D and 350D
Whirley Obs., MPC Code Z89

 

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