 |
11-19-2005, 02:55 PM
|
#1
|
Rivet Master 
1984 31' Airstream310
Dunsmuir
, California
Join Date: May 2004
Posts: 1,336
|
What size breaker for 8 gauge wire?
Hello Everyone. I have installed a 400 Watt Xantrex Inverter in My 1984 310 Limited MH. Power is supplied to the inverter via a dedicated 8 gauge wire approximately 10 feet long. The manual for the inverter does not tell me the maximum DC amperage the inverter will draw but I want to install an inline fuse/breaker. My question is what is the maximum amperage should I select for the fuse/breaker?
|
|
|
|
11-19-2005, 03:45 PM
|
#2
|
Rivet Master 
, Minnesota
Join Date: Aug 2003
Posts: 7,721
|
Based on the wire size, I would use a 50a. Doesn't the inverter have a built in fuse or breaker?
Hard to believe it wouldn't say something in the manual.
The TS400 recommends a 80a fuse, but that would mean a larger 6 AWG supply wire.
|
|
|
|
|
11-19-2005, 04:50 PM
|
#3
|
Rivet Master
1984 31' Airstream310
Dunsmuir
, California
Join Date: May 2004
Posts: 1,336
|
Yes, the inverter has a breaker. I want to protect the circuit in case there is a break in the hot lead, or the hot terminal on the inverter is shorted.
|
|
|
|
|
11-19-2005, 06:17 PM
|
#4
|
3 Rivet Member 
2003 25' Safari
spokane
, Washington
Join Date: Sep 2005
Posts: 114
|
Hello,
I have the same Xantrex inverter you are installing. My manual says a 50 amp circuit breaker is the recommended size. I got mine from Star marine, it's a Blue Sea BS1010-0 50 amp surface mount circuit breaker. Check em out.....
|
|
|
|
|
11-19-2005, 09:22 PM
|
#5
|
Rivet Master
, Minnesota
Join Date: Aug 2003
Posts: 7,721
|
Xantrex recommends 80a fuses for true sine wave inverters and 50a fuses for modified sine wave inverters.
So I guess is depends on which inverter you have. Stick with 50amps unless you upsize the dc wire.
|
|
|
|
|
11-20-2005, 10:48 AM
|
#6
|
Rivet Master
1984 31' Airstream310
Dunsmuir
, California
Join Date: May 2004
Posts: 1,336
|
Interesting. I checked my manual and it doesn't give a rating for the DC supply line. My inverter is an XPower Inverter 400 by Xantrex which I purchased at Costco. It produces a modified sine wave, max power of 400W, with a surge capacity of 700W.
|
|
|
|
|
11-20-2005, 11:52 AM
|
#7
|
3 Rivet Member
2003 25' Safari
spokane
, Washington
Join Date: Sep 2005
Posts: 114
|
from the Xantrex RS 400 installation manual (downloaded pdf) "use an 80 amp class T FUSE or a 50 amp CIRCUIT BREAKER......."
|
|
|
|
|
11-20-2005, 12:24 PM
|
#8
|
Rivet Master
1984 31' Airstream310
Dunsmuir
, California
Join Date: May 2004
Posts: 1,336
|
Based on the output wattage I had guessed that 50 amp might be the correct size. The inverter you looked up is not the same model as mine. I can't find my model on the site - I did look before posting my original question. (Maybe it was a Costco special). The printed manual that came with the inverter didn't specify.
The inverter came with two input cords, one with a power point (cigarette lighter) connector to be used for loads under 120 watts, and a cord with two battery clips for heavier loads.
|
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
Similar Threads
|
| Thread |
Thread Starter |
Forum |
Replies |
Last Post |
|
awning polycord size
|
sovereign |
Awnings |
5 |
04-23-2012 11:38 AM |
|
Converter Breaker?
|
Sav'h Steve |
Electrical - Systems, Generators, Batteries & Solar |
7 |
11-18-2002 08:45 AM |
|
Extra wire
|
susan martin |
Batteries, Univolts, Converters & Inverters |
3 |
09-21-2002 07:52 AM |
|
Replacing wire harness
|
Les Gilliam |
Batteries, Univolts, Converters & Inverters |
4 |
08-19-2002 08:25 PM |
|
Refrig pressure gauge.
|
casarodante |
Refrigerators |
5 |
07-08-2002 11:04 AM |
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
