Differences

This shows you the differences between the selected revision and the current version of the page.

--- electrics:installation_techniques:micc
+++ electrics:installation_techniques:micc 2009/10/17 00:11 current
@@ Line 1: / Line 1: @@
+====== How to terminate an MICC gland ======
+\\
+[b][u]RF Lighting's guide to terminating MICC cable.[/u][/b]
+\\
+You will need:
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc1.jpg[/img]
+\\
+From left to right: Pot (this one has an earth tail), pot seal, gland, potting compound, joistripper, pot crimper, stub sleeving, pliers.
+\\
+[b]Step 1:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc2.jpg[/img]
+\\
+Cut the cable off square. This can be done with a junior hacksaw, a ringing tool or sharp cable shears.
+\\
+If the MICC is old, cut 100mm - 200mm off the end. The magnesium oxide is hygroscopic, and will have absorbed moisture.
+\\
+You will not be able to get a joistripper started if the cable has been cut with sidecutters or pliers.
+\\
+[b]Step 2:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc3.jpg[/img]
+\\
+Start to strip the cable by turning the joistripper clockwise down the cable.
+\\
+[b]Step 3:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc4.jpg[/img]
+\\
+When you have stripped the cable to the desired length, lightly grip the cable with your pliers. Run the joistripper upto the pliers. This will give you a nice clean square cut.
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc5.jpg[/img]
+\\
+[b]Step 4:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc6.jpg[/img]
+\\
+Put the gland top, olive and gland bottom onto the cable. Do not tighten it up yet.
+\\
+[b]Step 5:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc7.jpg[/img]
+\\
+Screw the pot onto the cable until the sheath of the cable is flush with the bottom of the pot.
+\\
+Be very careful not to twist the cable whilst screwing the pot on.
+\\
+Then pull the wires slightly apart, and test the wire ends for shorts with an insulation tester.
+\\
+[b]Step 6:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc8.jpg[/img]
+\\
+Slightly over-fill the pot with potting compound. You should work it in a bit at a time from either side of the pot.
+\\
+Use the backing paper from the compound to push it into place, being careful not to touch the compound, as this could contaminate it with grease / dirt, which could cause the pot to not properly insulate the end.
+\\
+[b]Step 7:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc9.jpg[/img]
+\\
+Slide the pot seal into place, making sure the wires are not twisted.
+\\
+[b]Step 8:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc10.jpg[/img]
+\\
+Insert the pot assembly into your pot crimper, making sure the three prongs on the crimper are between where the wires come through the seal.
+\\
+[b]Step 9:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc11.jpg[/img]
+\\
+Crimp the pot.
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc12.jpg[/img]
+\\
+You can see in the second picture what I mean about lining the prongs up on the crimper between where the wires come through the seal.
+\\
+[b]Step 10:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc13.jpg[/img]
+\\
+Sleeve the wires with stub sleeving, and then carry out another insulation test to ensure the cable is fault free. You will then need to carry out a continuity test to give the cable it's polarity.
+\\
+[b]Step 11:[/b]
+\\
+[img]http://i69.photobucket.com/albums/i62/RFLighting/micc14.jpg[/img]
+\\
+Slide the gland into place. You would normally tighten this up once the gland has been screwed into whatever the cable is being terminated into.
+\\
+[b]Step 12:[/b]
+\\
+Go wash your hands. Magnesium oxide is poisonous, and must not be ingested.
+\\\\
+ :D