Salvo
California
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You shouldn't have to make any wiring mods to the ac or dc circuits. AC ground should already be connected to trailer frame.
BTW, when using the gen, ac ground is floating. It has no electrical reference.
Sal
webdr wrote:Thanks guys. I plan on grounding the ac from the negative bus bar in the breaker box to the trailer frame. As stated, the neutral will remain floating.
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webdr
Atlanta
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Salvo wrote:You shouldn't have to make any wiring mods to the ac or dc circuits. AC ground should already be connected to trailer frame.
BTW, when using the gen, ac ground is floating. It has no electrical reference.
Sal
the trailer did not come with a breaker box, Im adding one. its called an Intelli-power PD4045 AC/DC convertor with an ac breaker box built into it. Theres nothing currently in this trailer except wood panels. Clean slate. So, when I install the breaker box, I will be running a wire from the negative ground bus in the breaker box to the frame, thus grounding the 120 ac to the frame. This is what people have been saying I need to do. Just want to make sure were on the same page.
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MrWizard
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in the breaker box section (not DC section) you bond AC grd to the grd bar
the DC fuse section will have a seperate DC-neg buss bar for connecting the neg side of the DC circuits
motor vehicles use a neg DC grd
RVs with two power sources are wired with two wires for the 12v circuits
in other words every light etc has two wires that go all the way to the 12v converter
grounding is a safety feature in case some shorts out, it is Not part of the power circuit
in a tt or RV the battery neg is typically grounded because of the exterior VEHICLE running lights and the charging from the alternator
but the interior rv circuits are ALL two wire all the way to the converter
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Salvo
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You will need to connect the ac ground bus to chassis. This is a single point connection. I would double check with an ohm meter to verify that this connection is not yet in place. There should be zero ohms between chassis and ground of an ac receptacle.
Sal
webdr wrote: So, when I install the breaker box, I will be running a wire from the negative ground bus in the breaker box to the frame, thus grounding the 120 ac to the frame.
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webdr
Atlanta
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Almot wrote:webdr wrote:I plan on grounding the ac from the negative bus bar in the breaker box to the trailer frame. As stated, the neutral will remain floating.
I think you meant grounding the DC from negative bus.
No, actually I did mean I will ground the negative bus to the frame on the 120. Heres a picture of the PD4045 Im using. you can see the negative bus on the bottom right. People keep saying I need to ground that negative to the frame. Am I hearing correctly?
thanks
Matt
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webdr
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MrWizard wrote:in the breaker box section (not DC section) you bond AC grd to the grd bar
the DC fuse section will have a seperate DC-neg buss bar for connecting the neg side of the DC circuits
motor vehicles use a neg DC grd
RVs with two power sources are wired with two wires for the 12v circuits
in other words every light etc has two wires that go all the way to the 12v converter
grounding is a safety feature in case some shorts out, it is Not part of the power circuit
in a tt or RV the battery neg is typically grounded because of the exterior VEHICLE running lights and the charging from the alternator
but the interior rv circuits are ALL two wire all the way to the converter
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KD4UPL
Swoope, VA
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I don't think you're using the terminology correctly. You keep saying "negative buss" this can only mean the DC side. There is no "negative" on the AC side. The AC side has hot (black), neutral (white), and ground (green or bare). Ground (green) should be connected to the frame, neutral (white) should not.
On the DC side, the negative should be connected to the frame. The positive should not.
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Salvo
California
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That buss is not called "negative", but ac ground. The green wire from the converter is connected to that buss bar. This buss should have a connection to chassis/frame.
Sal
webdr wrote: People keep saying I need to ground that negative to the frame. Am I hearing correctly?
thanks
Matt
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webdr
Atlanta
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LOL! Thanks gents.
My newbie green is showing! I meant ground, not negative.
And you all have confirmed that I will ground the green to the frame through the buss.
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ktmrfs
Portland, Oregon
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smkettner wrote:My trailer came OEM with 120v ground and battery negative attched to the frame.
Fuses and switches on the 12v positive.
No bond (connection) between 120v neutral and ground in the trailer.
I would only have it this way. RVIA standards.
x2
and NEC compliance as well. you should see an open circuit between the 120V neutral and 120V ground if you measure at the plug.
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