Sealing a cable
Sealing a cable
(OP)
Hi,
I have the following challenge. I need to seal 3 to 6 mm cables in a 6.5 mm hole. There can be different jacketing materials on the cable PVC, PUR or Low smoke non halogen jackets. The seal has to meet IP65 (dust and water resistant) . be as chemical resistant as possible and should act as strain relief. I'm looking for an adhesive that can do the trick instead of the common rubber washers and mechanical strain relieves.
It should set as quickly as possible. Ones the cable is fixed it's fixed so no need to ever remove it ever again.
Any ideas or leads would be very welcome. I'm thinking like a PUR foam or a Intumescent material but have little experience with these materials and a problem where to start. So all help welcome
I have the following challenge. I need to seal 3 to 6 mm cables in a 6.5 mm hole. There can be different jacketing materials on the cable PVC, PUR or Low smoke non halogen jackets. The seal has to meet IP65 (dust and water resistant) . be as chemical resistant as possible and should act as strain relief. I'm looking for an adhesive that can do the trick instead of the common rubber washers and mechanical strain relieves.
It should set as quickly as possible. Ones the cable is fixed it's fixed so no need to ever remove it ever again.
Any ideas or leads would be very welcome. I'm thinking like a PUR foam or a Intumescent material but have little experience with these materials and a problem where to start. So all help welcome





RE: Sealing a cable
The electrical systems were sealed to keep from igniting the gas, which could be anywhere, or not.
The last step in sealing every junction box was pushing a wad of epoxy into the conduit connections around the wires. I think it was a thickened two-part epoxy, mixed in the applicator's hand. It may have been special purpose, certified etc., and intended just for hazardous area service, and expensive. For you, any number of common cut-off-and-knead epoxies might be okay.
Sealing was saved as the last step because it was permanent, and just not possible to adjust to add a wire, etc. I don't know if that would be sufficient strain relief for your purposes.
Mike Halloran
Pembroke Pines, FL, USA
RE: Sealing a cable
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: Sealing a cable
Z
RE: Sealing a cable
I like Mike's solution - epoxy barrier seals get a heck of a hold on conductors, to the point where the conductor will snap rather than pull free. The mechanical strength of the seal will depend on the panel thickness as well as the hole diameter.