Twist lock pendant

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wireday

Senior Member
Location
New England
Occupation
Master electrician
twist lock 20 amp120 volt receptacle on ceiling, cord with male twist lock plug down to table with female cord cap, Do I need anything for added strain relief at the ceiling?
 

wireday

Senior Member
Location
New England
Occupation
Master electrician
That makes it permanent, Am I allowed to use the twist lock only? So it can be removed when not used? the area is used for multiple things.
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
They're called "Kellems grips" and other names. Take the pics to your supplier; Grainger has them, too.
 

wireday

Senior Member
Location
New England
Occupation
Master electrician
I was trying to find the one for the cord cap like in Larrys picture, Im pretty sure my supply store will not have one,
 

synchro

Senior Member
Location
Chicago, IL
Occupation
EE
You can also use grips that are supported separately like in the video at the link below, instead of putting tension on the electrical connections beween the cord cap and recepatacle:


If you wanted to quickly disconnect and reconnect such a separate grip from its support, you could use a snap hook or carabiner.
 

kwired

Electron manager
Location
NE Nebraska
twist lock 20 amp120 volt receptacle on ceiling, cord with male twist lock plug down to table with female cord cap, Do I need anything for added strain relief at the ceiling?
I'd say it maybe a judgmental thing as to whether any added strain relief is necessary. Situations of low ceiling, not so heavy cord, little chances of it being pulled on, etc. may not require additional strain relief.

The fact you already have a receptacle on the ceiling - you also need to consider whether the receptacle itself can handle any mechanical load imposed on it.
 

winnie

Senior Member
Location
Springfield, MA, USA
Occupation
Electric motor research
You can also use grips that are supported separately like in the video at the link below, instead of putting tension on the electrical connections beween the cord cap and recepatacle:


If you wanted to quickly disconnect and reconnect such a separate grip from its support, you could use a snap hook or carabiner.

I personally would prefer this approach.

There might be an OSHA requirement to prevent mechanical load on the plug/receptacle terminals, but I'm not really sure of that. I'm going to simply state this as my design preference.

-Jon
 

MTW

Senior Member
Location
SE Michigan
For pendant outlets in manufacturing facilities, I always used bus drop cable and hardware. A “Sky-Ty” cable tension device up top to provide spring tension support and a FS style box on the lower end for devices. You can leave a loop in the hangar assembly at the top side, so that the cable drop could be relocated a faIr distance away, if required to accommodate production changes.




 

jap

Senior Member
Occupation
Electrician
I'd be in the camp that decided to use the strain relief on the cord itself to keep the weight off of the connector and receptacle at the ceiling.

JAP>
 
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