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Liquid electrical tape  Rate Topic 
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 Posted: Thu May 4th, 2017 08:11 pm
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Felix Cook
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Looking at this stuff it seems so expensive does anyone know if it is the same as liquid latex or bitumen just rebranded? I've found an old repair to the head wire on a 1920's Gilbert fan using the same black rubber stuff in appearance and under the old type of cloth tape so i'm guessing its not a new technique...

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 Posted: Thu May 4th, 2017 11:09 pm
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David Allen
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The liquid tape they sell these days is a solvent blended vinyl plastic compound. It is good for sealing moisture out of wires that you are repairing with electrical tape. It's not very good for much by its self.

The basic usage is:
1 - Solder wires together.
2 - Daub liquid tape on the joint.
3 - Wrap tape over the liquid taped joint.

Optionally, step 3 can be replaced with:
-Apply heatshrink tubing and shrink it onto the liquid taped joint.

It's not good for flat surfaces, and not good for anything that gets hot such as motor winding areas.

Hope this helps!

Sincerely,
David

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 Posted: Fri May 5th, 2017 09:18 pm
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Felix Cook
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Thanks, its funny you mentioned your last point because I was intending on using it on the head wire where the insulation has crumbled away at the point the wire exits the winding. It's quite loose and fragile at the moment. 

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 Posted: Sat May 6th, 2017 01:21 am
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David Allen
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Felix Cook wrote:
Thanks, its funny you mentioned your last point because I was intending on using it on the head wire where the insulation has crumbled away at the point the wire exits the winding. It's quite loose and fragile at the moment. 
Felix, I would definitely recommend polyolefin heatshrink tube to reinforce the stator lead wires. It will be a much better choice than liquid tape, however you could apply some liquid tape underneath the heatshrink tube if desired.

The following picture is the stator lead wires of an Ilg 48" fan motor. They were completely bare copper with all insulation crumbled off. This shrink tube is wonderful stuff.



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 Posted: Sat May 6th, 2017 01:30 am
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Lane Shirey
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I often use epoxy right where the wires enter the stator windings and then shrink tubing beyond that. I've had a few GEs where the headwires are dust and the junction point to the windings is buried beyond where I want to tread. The epoxy fortifies the wiring, is an insulator and will take the heat. Just make sure the wires are pointing in the direction you want them before it hardens. 

I figure if the motor needs further work after I am done, it'll likely need a rewind anyhow and then the permanent epoxy repair really doesn't matter much. 

Last edited on Sat May 6th, 2017 01:32 am by Lane Shirey

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 Posted: Fri May 12th, 2017 09:23 am
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Felix Cook
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Thanks for your advice, I finally got icloud to get these photos up to highlight my situation. Here you can see how fragile the stator wire is and the black rubber blob repair, that was under the old fashioned cloth tape it looks like rubber or tar or something, just thinking as a repair it kind of fits the style of the fan and would suit it much better. Trying not to touch the stator unnecessarily. 



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 Posted: Fri May 12th, 2017 11:34 am
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John McComas
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I highly suggest using Scotch 27 tape for head wire or higher than ambient temperature electrical connections.
Search forums for Scotch 27  A 3M product.  Works great!

http://www.afcaforum.com/view_topic.php?id=35270&forum_id=1&highlight=scotch+27


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