OldBroadcastTech
Senior Member
- Location
- Western IL
- Occupation
- Retired Broadcast Technician
Connector/Strain Relief
- Thread starter Little Bill
- Start date
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
What is the difference between what you recommend vs original?
Thanks!
Shaneyj
Senior Member
- Location
- Katy, Texas
- Occupation
- Project Engineer
Yours is a 3106A… the “A” means it’s an open backshell designed to be overmolded.
The 3106E or 3106F has a screw clamp on the backshell to provide strain relief on your cable assembly.
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Shaneyj
Senior Member
- Location
- Katy, Texas
- Occupation
- Project Engineer
Also, the A doesn’t have any environmental protection. That is meant to be obtained by the overmolding.
The E/F versions have a plastic and rubber insert in the backshell that provide ingress protection
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- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
So I wouldn't need an additional Kellum strain relief?
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
What is the difference between the MS and this 97 that old broadcast linked to?
Shaneyj
Senior Member
- Location
- Katy, Texas
- Occupation
- Project Engineer
Tension strain is covered by connector thread and back shell, which is what a kellum would cover.
If there is more than 3-5 lbs in sheer (cable weight hanging perpendicular to connector) I'd find a way to support that.
Brush up those soldering skills! Yours is a large (8 awg) contact size so it shouldn't be too tedious to get into.
Shaneyj
Senior Member
- Location
- Katy, Texas
- Occupation
- Project Engineer
MS meets the military spec (heavy duty) and 97 is general duty.
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
Thanks, I appreciate you, and the others, who took the time to help. All info was great and helpful!!!
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
Just got the connector in. It came with no instructions. I can probably figure it out but thought you or someone might be able to guide me some.
Here is how it came out of the bag............
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Can you first assign some numbers or letters to each part, in your picture?
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
I could figure it out if I had it in my hands.
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
Left to right, top to bottom
1. seems to be what cord goes thru, maybe part of strain relief
2. bottom of connector where cord enters, where cord clamp goes
3. seems to be a cover for solder connections
4. cord clamp/strain relief
5. main body where wires get soldered
6. i think that was just a cover/retainer over the main body for shipping
7. Ring that screws onto male pins on machine
1. seems to be what cord goes thru, maybe part of strain relief
2. bottom of connector where cord enters, where cord clamp goes
3. seems to be a cover for solder connections
4. cord clamp/strain relief
5. main body where wires get soldered
6. i think that was just a cover/retainer over the main body for shipping
7. Ring that screws onto male pins on machine
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
I think I can figure out the asbly but I do have a question. Part #2 screws onto part #5, problem is, after the wires are soldered into the pins and the cord is running thru, how would you screw the two parts together without the wire/cord twisting? The pins seem to be pressed in. If they were loose, there would be no problem.
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
I believe this is the way it goes, but will have the cord/wires running through.
I think that if I leave the clamp loose I can screw the parts together without the wires twisting.
I think that if I leave the clamp loose I can screw the parts together without the wires twisting.
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leave the clamp completely off of the backshell, then install it after the connector is assembled.I believe this is the way it goes, but will have the cord/wires running through.
I think that if I leave the clamp loose I can screw the parts together without the wires twisting.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
I also push the cable into the plug a bit as I tighten the clamp.
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
Success!
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
I adjusted it when they tested the equipment. The clamp is also considered a strain relief. Also, they told me they don't handle the ring by the connector but had some previous workers that did.
That connector doesn't leave much room for soldering!