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excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5740

1999 Defender 110 Td5 SW Caledonian Blue

wiring multiple Carling switches

Looking at the Carling switches wiring instructions there is a power in & power out, earth and illumination
Earth I have done the same earth for each switch and same with illumination.

Is there a reason, why I could not use a common positive feed, from one feed with suitable sized fuse for all switches and then loop in and out to each switch?.

For each relay I am switching I will have a fuse for each one. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

27th Jul 2014 8:32pm

VeeTee

Member Since: 06 Mar 2011
Location: Somewhere
Posts: 1512

I think there's nothing wrong with that, as long as you use the correct wire diameter. Note that, if you have for instance 6 switches and they are all on, then the first loop gets 6 times the current needed for the relays. I guess a relay needs approx. 200-300 mA, so with a decent wire size that won't be a problem.
I wired my muddstuff panel with 7 carling switches this same way.

Cheers, Vincent
1959 Polynorm 1/4 Ton Trailer, Olive Drab Green (sold)
1970 M416 Military Trailer (Camping Trailer Conversion), Epsom Green (sold)
1975 Series III 88 V6, Light Green (sadly sold)
1996 Defender 110 CSW 300 Tdi, Epsom Green (sold)
2000 Freelander 1 TD4 3-drs, Silver (sold)
2006 Freelander 1 TD4 5-drs Facelift Automatic, Tonga Green (sold)

MySite

27th Jul 2014 8:46pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5740

So some 16amp thin wall would suffice. The idea dawned on me while cooking tea... Normally I run a positive wiring up the to switch and then another wire back down. So plenty of wire knocking around. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

27th Jul 2014 8:49pm

Dave T

Member Since: 07 Jun 2013
Location: Glasgow
Posts: 487

I suppose it would depend on how many switches you have and what the switches were for. What would the effect of that one fuse blowing be, loss of all headlights or just a load of relatively unimportant auxiliaries? 2015 RRS Autobiography SDV6
1994 Def 90 300tdi

27th Jul 2014 8:51pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5740

The switches are for things like, rear work lights, front spot lights, orange strobe lights. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

27th Jul 2014 8:55pm

ken

Member Since: 18 Aug 2009
Location: Banging Birds with my bitches !!
Posts: 4328

My roof console has comon neg +feed & lights however the output always goes to a relay

27th Jul 2014 9:33pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5740

Each switch will have a relay, with a fuse for each circuit. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

27th Jul 2014 9:41pm

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