getting soap box out again, beware rant on electrics | General Chat | GBS Owners Club
Avatar

Please consider registering
guest

sp_LogInOut Log In sp_Registration Register

Register | Lost password?
Advanced Search

— Forum Scope —




— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

sp_Feed Topic RSS sp_TopicIcon
getting soap box out again, beware rant on electrics
September 15, 2016
12:21 am
Avatar
Simon
GBS Technical
Admin
Forum Posts: 2139
Member Since:
August 9, 2013
sp_UserOfflineSmall Offline

Wiring, I like wiring, its like a puzzle, you follow the dots (diagram) and it works or goes up in smoke, a bit like Russian Roulette Smile

OK, nothing like Russian Roulette, the system is so over protected all you get is a small pop when the fuse blows.

but it does amaze me how builders get into some very odd situations.

the switches we use, the Savage type are rated to 10 amp. this means they can pass a current of 10 amp at 12 volt.

volts x amps = whatts

so a 21 whatt brake light bulb would need 21/12 = 1.75 amps

a side light is 5 whatt, 5/12 = less than half an amp x by four and the total draw on the side light circuit is approx 2 amp plus dash lights etc..

So why, use wiring that could start the car.

0.5 thin wall is rated at 11 amps, 0.75, 14 amps and 1.0 over 16 amps.

not only is larger cable more expensive, but terminals must be sized carefully, it is harder to run neatly, and looks a mess much quicker.

calculate what will do the job, don't go overkill.

If anyone is planning anything other than plug and play, post me

September 15, 2016
12:23 pm
Avatar
z2000
Derby
Member
Members
Forum Posts: 53
Member Since:
August 18, 2013
sp_UserOfflineSmall Offline

Well said Simon, totally agree with you.

As someone who decided with the variations from a standard Zero build to do all the wiring myself, you are most correct about choosing the correct sized wiring.

Doing simple calculations to determine the load which the wires need to carry makes choosing the correct wiring to purchase a lot easier. With the exception of the headlight bulbs, everything on my car is LED so low current draw. I used 11amp and 16amp wiring for all of the circuits with the exception of the battery cables and starter motor/alternator cables which obviously need to carry a much higher current.

If you are able to do the simple calculations and aren't put off by creating your own looms, great, go for it.

Otherwise, it would be a good idea to stick with the GBS looms which are made for the job and you just need to route them and connect up. Easy Smile

Henry

If it isn't broken; take it apart and fix it!

Build PhotoBlog: http://tinyurl.com/GBSz2000

September 15, 2016
8:01 pm
Avatar
grimbo
Wing Buckinghamshire
Member
Members
Forum Posts: 65
Member Since:
September 7, 2013
sp_UserOfflineSmall Offline

good points Simon keep the cables thin that keeps the weight down means more speed LaughLaughLaughLaugh

January 31, 2017
10:46 pm
Avatar
wowblaauw
Member
Members
Forum Posts: 57
Member Since:
March 3, 2016
sp_UserOfflineSmall Offline

I love electrics gives me goose bumps and makes my hair stand up on end especially when I'm hugging both high voltage terminals??

Forum Timezone: Europe/London

Most Users Ever Online: 96

Currently Online: michaelhopps, jcolley
5 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Members Birthdays
sp_BirthdayIcon
Today None
Upcoming None

Top Posters:

nelmo: 560

Mitch: 367

TOPCATNO6: 336

NickMilbourn: 299

RichardL: 206

Graterham: 202

Foxtrottransit: 196

Marlin: 173

michaelhopps: 171

2ofus: 169

Member Stats:

Guest Posters: 2

Members: 4804

Moderators: 0

Admins: 4

Forum Stats:

Groups: 2

Forums: 17

Topics: 1390

Posts: 8422

Newest Members:

Waisher, RobertCup, amandafa69, Andrewdeeby, Kavidkoglymn, Angelbeify, edwinlj60, Jerryzew, Davidthite, Kennethfus

Administrators: dijitul: 2, MidsZero: 314, Simon: 2139, Ruth Hall: 10