Can four 55 watt, 12 volt lamps be operated in series with an in line 20 amp fuse? Hella 500's Jeep light bar.
- conejote_99Lv 71 decade agoFavorite Answer
you need a 35 amp fuse and it is also a good idea to add a relay and run power from the battery to to the lights using the relay
I DID INSTALL 4 HELLA 2 MONTHS AGO EACH COME WITH SET COMES WITH A RELAY FUSE
the installer connect them together with a 30 amp fuse near the battery it burn a few times when the customer use the lights
then we switch to a 35 fuse and it is working fine
SO 1 FUSE 35 TO 40 AMPS
- Phillip SLv 61 decade ago
Four times 55 Watts = 220 Watts total load.
Divide 220 by 12 volts = 18.333 Amperes (DC)
A 20 Amp Fuse might hold the current load, but a
25 Amp Fuse sounds more realistic due to the
line connection loads, and possible voltage drops
at any of the lamp contacts.Source(s): Licensed CA smog inspector.
- Anonymous1 decade ago
WOW! Nobody has a clue.
A 25 amp fuse is the lowest required, however, running 12V lights in series will divide the voltage to each light by 4. Each light will only get 4 volts and therefore won't light.
To keep the right voltage, wire the lights in parallel. There are NO lights ran in series in the car, they are ALL in parallel.Source(s): A.A.S. degree in Electronics/Industrial Electronics with 25 years in the mobile audio/consumer electronics field
- 1 decade ago
i would just stick to the two seperate fuses that it comes with in the harnesses.(each pair should have a fuse in the pre-wired harness)