Reply
 
Thread Tools Display Modes
 
Old 09-05-2010, 08:30 AM   #1
Junior Member
 
Join Date: Jun 2010
Posts: 12
Inverter Wiring - are 2 25 amp inputs the same as 1 50 amp?

Each circuit in the fuse box wired to the house battery of my e350 diesel has a max load of 30 amps and I want to wire in an inverter thatís supposed to be protected with a 50 amp fuse. I donít want to run any more wire directly to the house battery. Option one would be to run a line with a 50 amp inline fuse from the hot terminal on the fuse box to the inverter. Option two, which is my preferred option, is to run two 25 amp circuits to the inverter. Iíd run one set of a hot and a ground from the fuse box to the inverter with a 25 amp fuse and then run a second hot and cold from the fuse box to the inverter, also with a 25 amp fuse. Would this work? Are two 25 amp lines equivalent to one 50 amp line? It seems to me that the worst case scenario would be one or both fuses would blow.
__________________

forde350diesel is offline   Reply With Quote
Old 09-05-2010, 09:37 AM   #2
Site Team
 
Ford_6L_E350's Avatar
 
Join Date: May 2007
Location: Washington - Ridgefield
Posts: 4,725
Re: Inverter Wiring - are 2 25 amp inputs the same as 1 50 amp?

Two 25A circuits are not the same as one 50A circuit. While it might seem they should be, in reality one circuit will always have slightly less resistance and take more current - when that fuse blows, the other one will also blow.

You could take one of the 25A circuits, change the fuse to 50A and double up the wiring to make your 50A circuit.

Mike
__________________

__________________
SOLD04 EB350 Custom Floorplan
6.0 PSD 4.10 Posi
Salem Kroger coil spring 4wd
SMB Trailer w/AT Air Suspension
Alaska to Key West, Labrador and more
130685 miles 16.65 mpg average

Prostate cancer survivor. viewtopic.php?f=8&t=11099
2015 VW GTI
Leaving CA for WA
Ford_6L_E350 is offline   Reply With Quote
Old 09-05-2010, 09:56 AM   #3
Junior Member
 
Join Date: Jun 2010
Posts: 12
Re: Inverter Wiring - are 2 25 amp inputs the same as 1 50 amp?

The fuse box is only rated for 30 amps per circuit so I can't use any fuses over 30 amps.
forde350diesel is offline   Reply With Quote
Old 09-05-2010, 01:03 PM   #4
Site Team
 
daveb's Avatar
 
Join Date: May 2007
Location: Turlock Ca
Posts: 9,806
Garage
Re: Inverter Wiring - are 2 25 amp inputs the same as 1 50 amp?

You can't tap off the separator lug?
__________________
2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer

Sportsmobile 4X4 Adventures..........On and off road adventures
daveb is offline   Reply With Quote
Old 09-05-2010, 04:59 PM   #5
Junior Member
 
Join Date: Jun 2010
Posts: 12
Re: Inverter Wiring - are 2 25 amp inputs the same as 1 50 amp?

The separator is underneath the van and I'm trying not to put any more holes for wires in the floor, but the separator connection is a possibility. Thanks for the idea!
forde350diesel is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Sportsmobile Registry

SilVan

dhally

VivaLaVida

Pschitt
Add your Sportsmobile
Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 04:49 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.