connect multiple items at +12v in fusebox

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anewman

Copper - Posts: 52

Joined: January 03, 2008

Location: United Kingdom

Posted: October 04, 2008 at 2:55 PM / IP Logged

To tidy things up I am planning to use a fuse holder rated up to 30a with a 30a fuse, connected to the positive wire at the fusebox and to have this connected up to a double bullet connector, and then to have that connected to a number of devices and another double bullet connector. Items connected will include 20a, 15a, 5a, 5a.

I am just wondering if this is a good idea, or if there's a better way? Thanks in advance.

i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: October 04, 2008 at 5:34 PM / IP Logged

An automobile manufacturer will not spend any extra money on wire. The wire supplying the fusebox is probably not large enough to handle an extra 30 amps of current. If you are wanting to have these items only hot when the key is in accessory or ignition position, You really need to run a 10 Ga wire to the battery with a fuse and fuse holder mounted at the battery, connect it to terminal 30 of a Bosch/Now Tyco automotive relay. Connect your new devices to terminal 87. Ground terminal 85 and connect 86 to a switched or accessory wire from the vehicle. If we knew what kind of car you had, we could even give you a wire color and location to find the wire.

anewman

Copper - Posts: 52

Joined: January 03, 2008

Location: United Kingdom

Posted: October 04, 2008 at 6:30 PM / IP Logged

The higher current ones (20a and 15a) are only used momentarily (central locking and parking light flasher input), and generally only used when the rest of the electrics are off. Don't know if that makes it acceptable to just connect up to the fusebox?

Should the battery -> fusebox feed wire ever get warm in normal use? I have noticed mine get quite warm - although doesn't appear to get warm enough to cause any kind of damage.

Car is Skoda Favorit but I have access to wiring diagrams so am able to determine location and colour of wires etc :)

anewman

Copper - Posts: 52

Joined: January 03, 2008

Location: United Kingdom

Posted: October 05, 2008 at 9:12 AM / IP Logged

This is what I had in mind with one device connected and 4 female receptacles for other devices.

connect multiple items at +12v in fusebox -- posted image.

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: October 05, 2008 at 11:17 AM / IP Logged

If the devices require constant voltage, You can run to battery without the relay. I had assumed you needed switched power since you wanted to go to the fuse box.

04nata

Copper - Posts: 358

Joined: April 22, 2008

Posted: October 05, 2008 at 12:17 PM / IP Logged

I just ran a 10 gage wire direct to the battery, with a 15 amp fuse, then ran it back and spliced in toggles that lead to the different items, headrest monitors, dvd, cathode lights, etc.

anewman

Copper - Posts: 52

Joined: January 03, 2008

Location: United Kingdom

Posted: October 05, 2008 at 12:40 PM / IP Logged

If I remember correctly there is a way of passing an extra cable through the bulkhead without drilling, just means stripping everything down. Seems likely to be safer at battery. Fusebox is the lazy option as it is in the passenger compartment connect multiple items at +12v in fusebox -- posted image.

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: October 05, 2008 at 12:48 PM / IP Logged

If we knew what kind of a vehicle you had, we could probably tell you where you can run a wire through the firewall.

anewman

Copper - Posts: 52

Joined: January 03, 2008

Location: United Kingdom

Posted: October 05, 2008 at 1:14 PM / IP Logged

As mentioned above, Skoda Favorit. The newer Skoda Felicia has the same chassis - guessing neither were exported to the US though. I know I can definitely send a wire through the back of the instrument panel where the hydraulic headlight adjusters pass through, as the rubber grommet there has "nobbles" on that could be chopped off. Would be better passenger side though. I think with some exploring I'll find somewhere.

i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: October 05, 2008 at 1:36 PM / IP Logged

Sorry, I did read that earlier, but they do not sell those here. I sent Howie a PM, he should be able to help you with a location.

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