Posted: Fri Nov 16, 2007 6:24 pm Post subject: OT: Insulating Tape?
Hi,
I am buying power supplies that are "open framed" meaning that the components are mounted on a piece of metal rather than enclosed in a box. So, the transformer, etc. are exposed. A customer wants me to insulate all exposed electrical connectors, so I put shrink tubing onto the wires before I solder them to the terminals. The problem is with the terminals that are already soldered my the PS manufacturer.
Rather than remove the wires to add shrink tubing then re-soldering, I want to use some sort of tape that I can wrap around the joint and then melt into place (sort of a "shrink tape"). Standard electical tape will not satisfy my customer. They want something more permenant.
I contacted 3M and was told that they stopped making this product about 15 years ago and could not give me a lead on a new source.
Can anyone recommend a product and/or a source?? Or, is there another clever solution that I am not clever enough to think of?!?
By the way, this item will be left outsoors, but will be in a NEMA enclosure. So it will see temperature extremes and condensing humidity but not direct rain/snow.
Posted: Sun Nov 18, 2007 3:32 pm Post subject: Insulating PCB's
The liquid rubber electrical tape stuff is heading in the right direction but it is not really an industry accepted way to do what you are trying to do. What you are actually looking for is called "conformal coating" material. It it is a clear coating which is hard when it dries and will not peel off. It is often used for assemblies in damp areas or for high voltage at very high altitudes where arcing can occur.
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