Running Through Firewall

[undeadxsunshine 10+ year member]

If I have to drill a new hole through my firewall to run my 1/0 power wire, what's the best kind of grommet to use?

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[misfit138 5,000+ posts]

Any grommet that's big enough to accept the wire. Something like this. Parts-Express.com:

 

[Canaan 10+ year member]

Those $7 grommets are not required.

I use the cheap 3/4" $0.50 snap grommets and hotglue them in place. I get them in 100pc bags and never had a problem.

 

[inkfx 10+ year member]

I just used some expanding foam and sealant on mine. Works just fine. Will be a little more work having to remove it if I ever need to run more wires but I'll worry about that when the time comes.

 

[misfit138 5,000+ posts]

Those $7 grommets are not required. I use the cheap 3/4" $0.50 snap grommets and hotglue them in place. I get them in 100pc bags and never had a problem.

No, they aren't necessary. But the guy asked about grommets, so I linked the first suitable one I came across. A little bit of electrical tape can work just as well, but some people don't like installing stuff that way...

 

[Canaan 10+ year member]

No, they aren't necessary. But the guy asked about grommets, so I linked the first suitable one I came across. A little bit of electrical tape can work just as well, but some people don't like installing stuff that way...

True. I searched around and couldn't find the pop grommets I use in less than a 30pack. And they were more shipped than just 1 of the ones you posted.

I get the 100pc packs for ~$16.

 

[James Bang 5,000+ posts]

HOme depot ftw.

 

[James Bang 5,000+ posts]

No, they aren't necessary. But the guy asked about grommets, so I linked the first suitable one I came across. A little bit of electrical tape can work just as well, but some people don't like installing stuff that way...

F that

 

[Liv2ride 10+ year member]

Which section did you find them in at home depot ?

 

[James Bang 5,000+ posts]

$1.79 for a 3/4" that fits 0awg perfectly and 1/2" that fits 4awg. They're called Strain Relief Cord Connectors found in the electrical section.

 

[x1le 10+ year member]

F that

agree'd. electrical tape does not work just as well, or well at all. always use a grommet.

 

[XPerties 10+ year member]

Home depot has variety packs of grommet in the electrical area. 1 isle from the wire spools. It was $3.49 for the pack.

 

[misfit138 5,000+ posts]

agree'd. electrical tape does not work just as well, or well at all. always use a grommet.

I was just saying the grommets aren't absolutely necessary. I've seen literally hundreds of installs where the person didn't use a grommet to pass wiring through a firewall and not once have I heard of any of these people living to regret that decision. I'm not saying you shouldn't use a grommet, or that there's no way your wiring can short out, but I have seen MANY people neglect the situation altogether.

And for the record, I don't use electrical tape in this situation...

 

[x1le 10+ year member]

I get what you're saying, but it's bad advice tbh. A hole in the firewall can be razor sharp and slit through electrical tape and the wire pretty easily in the normal course of day to day driving. If people neglect it, they're dumb, and again always use a grommet lol

 

[James Bang 5,000+ posts]

I get what you're saying, but it's bad advice tbh. A hole in the firewall can be razor sharp and slit through electrical tape and the wire pretty easily in the normal course of day to day driving. If people neglect it, they're dumb, and again always use a grommet lol

indeed.