Securing a Cord Through a Panel

[PZ 1]

I am running an electric cord through a metal panel. I would like to use what I would call a grommet, but is called a "strain relief bushing" or "snap in cord connector". It is a two piece plastic clamp that goes on the cord and then snaps into a panel. I cannot find one large enough, the cord is .570. There is no access to the back side of the panel to put a fastener on. If nothing else, I could use a rubber grommet, but would like the cord secured so it cannot pull out.
Any suggestions on something that will work?

 

[darkzero]

I've known them to be called strain reliefs. Normally for larger sizes, rather than the pinch & snap in type, they usually have a collet design. Not sure what to call it. Basically the body is secured with a nut on the backside h the cord is secured by a tapered nut (inside taper) from the front. They come in plastic & aluminum. I've purchased the aluminum ones from Mcmaster.

You mentioned no access from behind to use a fastener but do you have access at all? For low strain relief cases I have gotten by with using a zip tie on the cord so it can't pull out of the hole or simply tie a knot in the cord.

 

[marinusdees]

Before the days of strain relief an Underwriter's knot was used. Requires access to the back, though.

 

[PZ 1]

I've known them to be called strain reliefs. Normally for larger sizes, rather than the pinch & snap in type, they usually have a collet design. Not sure what to call it. Basically the body is secured with a nut on the backside h the cord is secured by a tapered nut (inside taper) from the front. They come in plastic & aluminum. I've purchased the aluminum ones from Mcmaster.

You mentioned no access from behind to use a fastener but do you have access at all? For low strain relief cases I have gotten by with using a zip tie on the cord so it can't pull out of the hole or simply tie a knot in the cord.

It is going into a 3 inch square tube, 46 inches from the end.

 

[4xdog]

Maybe something like this?
https://www.mcmaster.com/strain-relief-grips/locking-snap-in-cord-grips-for-building-cable/

 

[Bigblue&Goldie]

Automation Direct might have something that will work for you.

 

[sberry]

Can fish a locknut?

 

[PZ 1]

Thank you for the replies. After a lot of on-line time, I have found a correct size strain relief bushing.

 

[62civa]

I use lots of Heyco brand strain reliefs at my electronics company. Heyco also make a tool just for use with the cable strain reliefs. The tool is not cheap, but it makes installing the strain reliefs super fast and easy.

https://www.amazon.com/dp/B001BPY6KI/?tag=atomicindus08-20

 

[Git]

How about a Cable Gland?

 

[WoodsTruck]

Drill and tap a hole for an eye bolt, anchor cord to the eye bolt with minimal tension going through the grommet?

 

[Miss the Pontiacs]

How about just wrapping with layers of electrical tape and taper it as you go. In addition you could drill a couple of holes close together put a tywrap through the holes and synch it up to hold cable in place.

 

[sberry]

Agree, drill tap, screw in fitting.

 

[csp]

Thank you for the replies. After a lot of on-line time, I have found a correct size strain relief bushing.

Care to share where you found it?

Also quoted for those who keep thinking you need more suggestions.

 

[Stephenw]

Cable clamp.

 

[nadogail]

I am fond of Kellums (sp) grips.

 

[sberry]

If it would suffice it probably get the cable clamp here too. I doubt its listed as a cord clamp though,,, ha

 

[theoldwizard1]

These are GREAT ! A pain to get the cord started, but it is NOT coming back out !

Non-Metallic Push-In Connector

 

[BD1]

Cable clamp.

That exactly what I use. I believe that's a Greenfield or BX connector too.


Sent from my iPhone using Tapatalk

 

[PZ 1]

Care to share where you found it?

Also quoted for those who keep thinking you need more suggestions.

Thanks - and I'll add again that there is no access to the back side. I got the strain relief from eBay! That was the first place I looked - but it's a long story.