40 AMP fuse

[bncinwv]

I use 30 amp fuses??? They are available at Auto Parts Stores. The 30 amp is what came in our 3400RL. Wonder if there is a difference in the frequency of the fuses blowing between the 30 amp and 40 amp. I would think a parts store 30 amp would be a lot cheaper than an RV dealer 40 amp. Just wondering.
Bingo

[TLightning]

For some reason it seems that some 3400RLs come with 30 amp and some come with 40 amp in line fuses.

[Emmel]

Whatever you do, never go over the 40amp fuse. If you continue to blow fuses, have your system checked out for a short somewhere. These rvs are not using wires heavy enough to run the higher amperage and using a bigger fuse could create a possibility of fires.
I would be more suspicious of a grounded wire causing the fuses to blow and if it is grounded, the bigger fuse could start melting the smaller gauge wires.

[Bob & Lee]

Mine has blowen a fuse 3X in the past year the first time it went I looked at it and it was a 30 amp so I replaced it with 30 amp yesterday I was replacing it and looked at the holder and it said 40 amp Sooooo now need to get 40's and try them if it keeps up Ill think about replacing it with a breaker.. has anyone tested the amp draw on the fuse?

bob

[berridge]

I have blown a 40A fuse when the pin did not release from the hitch when I was raising the trailer to unhook.Soon after the motor started to raise the rear of the truck the fuse blew. Now I watch the hitch and pin more carefully. Note that 40A blade type fuses don't seem to be generally available even in auto parts stores. Most Montana dealers seem to have a supply so get a few extras.

[racerjoe]

I have never blown a fuse on my jacks since 2005, even after lifting the rear of the truck. I think I would look over the wiring to the motor real good, and also the grounds. If you have a loose or poor ground it could overheat the wiring and blow a fuse. Also take a look to see if the motor gearing is not mis-aligned putting more stress on the motor. You should not have to keep replacing fuses and going larger to stop it from blowing.

[Bob & Lee]

Went yesterday to all the part stores and No 40 amp fuses Camping World and they did not have 40amp fuses but had the 40 amp breaker so for $7 I got it so no more replacment (I hope) .

[ehmcfarl]

Hey Bob, have you installed that breaker yet? If so, is it an inline breaker? I assume the 40amp blade fuse is in an inline holder somewhere on the hot wire going to the motor? Or, is it one of the 40 amp blade fuses in the fuse panel above the commode? If it is in the fuse panel how does the breaker wire in?

Buddy

[rogue]

Buddy, the 40 amp fuse is in-line on the hot lead in the front compartment. Had mine blow at our last stop before home on a 2 1/2 month trip. Had a heck of a time finding one, went to 5 places before finding 2 at NAPA.

I REALLY suggest getting a spare, which ever size (30 amp or 40 amp)that your unit takes. Cause if it goes and you are in the boonies, a smaller one will not work for raising the unit. Mine takes a 40 amp, but could use a 30 amp to lower, but could only get about 1 inch height before the 30's would blow trying to raise it.

[jjackflash]

quote:Originally posted by rogue

Buddy, the 40 amp fuse is in-line on the hot lead in the front compartment. Had mine blow at our last stop before home on a 2 1/2 month trip. Had a heck of a time finding one, went to 5 places before finding 2 at NAPA.

I REALLY suggest getting a spare, which ever size (30 amp or 40 amp)that your unit takes. Cause if it goes and you are in the boonies, a smaller one will not work for raising the unit. Mine takes a 40 amp, but could use a 30 amp to lower, but could only get about 1 inch height before the 30's would blow trying to raise it.

I also purchased 40 amp fuses at NAPA,their last 5 they told me they could order more if I needed them.
Jack

[ehmcfarl]

Thanks to Bob and Jack for the info on the fuse location and supplier. I will go today and buy a few. Do either of you have an opinion about replacing the fuse with an automatic-reset in-line breaker?

Buddy

[HamRad]

Buddy,

I'd replace the fuses with the auto-in-line breaker. Much easier to simply wait a few seconds and try again.

Dennis

[waldo238]

My 08 3000RK has a 30 amp fuse. Why would they put a different fuse in for different models?? Maybe it is because of the pin weight?? But then again we all probably have the same front landing gear.

[Bob & Lee]

The new breaker I bought is a in line, cut the wire and put round wire connections on the ends and it has pins w/nuts to tighten and can secure the entire thing to the wall. I will be puting it on this week, need to take the RV to the dealer on Friday to have the counter tops repalced, said it should take about 6Hrs and then I can pick it up and move back in.

[Tom Gina 06]

Another place to find the higher amped fuses is a car stereo installation store. I have found both 40 amp and 50 amp fuses at these locations in the back installation area. Most of the time they will not sell them to you but give you one.

[rogue]

Waldo238, Maybe if the model number starts with 30 you get the 30 amp fuse (only kidding).

[Bill and Lisa]

While you are out collecting fuses you may want to get some 50 Amp "Short Stop Fuses". My 07 3000RK has 2 of these located in the vicinity of the battery.



They are located on the back wall of the front compartment UNDER the shelf with the hydraulic motor. When I modified my battery box location and the controller for my landing gear I moved them up to the front edge of the shelf as seen in this picture.



The "circuit" from the battery is as follows...

1. Battery
2. short cable to first short stop fuse (item 4 connected on input side, item 3 on output side of fuse)
3. output from fuse goes to hydraulic motor
4. second jumper from Supply side of first short stop goes to second short stop fuse.
5. orange wire with inline fuse taps off input side of second short stop fuse and powers electric landing gear motor.
6. Output from second short stop fuse (2), thick grey wire feeds battery power to DC Distribution panel. A second thin black wire feeds unknown load.

One serious short fall with this arrangement is if you blow the second short stop fuse you "could" lose the ability to bring in your slides hydraulically. Even though there is still power to the pump the control signal comes from the in unit DC bus which is down stream of the second short stop breaker. If you are plugged in to AC and your converter is supplying the DC Distribution bus with DC then no problem but if you are not connected to AC then your slide control switch on the wall near the stairs has no power and does nothing for you......

If you think 40 amp blade fuses are hard to find 50 amp short stops are even harder.

[Emmel]

Bill, as I said before in this topic, I would not go to a higher amp fuse. First, you need to locate the problem that causes the 40 amp fuse to blow and fix that. Using a bigger fuse could cause the smaller gauge wires to get hot and could cause a fire. We've had a couple instances here where some wires have melted and almost caught fire and this was while using the correct fuse. Using the 50 amp fuse may not be the best answer.

[Bill and Lisa]

Emmel,
I am not recommending or suggesting going to a higher Amp fuse. The short stop fuses, as they came from the factory were 50AMP. IF you ever blow one all I was saying is they can be very difficult to find and while folks are out buying spares for other fuses in their rig they may want to pick up one or two of these fuses also. Sorry if I wasn't clear.

[Ozz]

Here is a link for the circuit breakers; Breakers
Even manual reset models.