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GrahamH

GrahamH club

Posted: 02 Jan 2016

Taken: 05 Dec 2015

0 favorites     1 comment    199 visits

1/1250 • f/2.8 • 5.0 mm • ISO 100 •

Canon PowerShot A1200

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Keywords

pit •
lead •
toowoomba •
wipe •
cable •
telecommunications •
telstra •
solder •
telecoms •
insulated •
jointer •
qld •
repair •
paper •
tech •
australia •
underground •
queensland •
jumper •
wire •
technician •
pillar •
joint •
nbn •

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WipeJoint122015 0905

WipeJoint122015 0905
Some water damaged paper insulated pairs which have been cut out by shortening the cable. Damaged paper causes crossed lines and dead lines, and dark corrosion causes noise in joints.

The jointer uses an LPG torch to melt solder (60 lead/ 40 tin) which is wiped around the cable, using a piece of hide to build a thickness of solder which seals the cable and gives some strength to the joint. Sterene, a fat based product, is melted onto the assist the wiping process.

Paper insulated lead-covered cable was damaged by NBN builders placing too much gear in the cable pit. Cable jointers from Telstra are repairing the water-damaged circuits. They were working at this and another nearby junction pit and pillar.
Comments
 GrahamH
GrahamH club
The conductors have paper insulation which is fine when there is no moisture. Damage seen here would be due to the repair activities. The paper gets damp and reduces its insulating effect create noise. Eventually the ring voltage or the exchange battery voltage breaks through to give a short on the pair or to a leg of an adjacent pair.
8 years ago.

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