Thursday, Oct 14, 2004 at 19:35
The accelerated corrosion was first described by NomadUsR (Ernie) and is now called the Nomad Syndrome !!
Most male sockets on the BT carry a charge wire to the batteries so this wire is always "live" in the socket. This gives rise to electrolysis in the presence of moisture.
Pins being pushed back into the housing is usually a fault of no lubrication on the pin itself. High friction on the pin and its corresponding socket then forces the pin over the plastic shoulder and pin recedes into the socket. Phil's tip of a squirt of lube should solve the problem and as a side effect control the electrolysis markedly.
The aluminium plugs and sockets verses the plastic versions are more robust but obviously more susceptible to electrolytic corrosion.
If you are not using the charge wire in the male plug I would snip it off just where it goes in to the plug terminal and cover with heat shrink. This will stop the electrolysis from a current being present via the wire.
If needed in the future it can be reconnected .... you should have enough room in the plug to take the wire out ...cover with heat shrink and turn it back on itself slightly (and not snip off) and reassemble.
My next connectors will be ...(best currently available- used on semi trailers with suzi coils)
Narva Heavy Duty Trailer Connectors.
For BT end ...7 Pin heavy duty, round metal plug with Internal weatherbeater seal and rubber boot. 40 amp cont. per pole rating.
Part No 83193
For vehicle end ..7 Pin heavy duty round metal trailer socket 40amp cont. with rubber boot. Die cast housing is self grounded.(pin1)
Part No 82094
Their blurb ....
Heavy duty plugs and sockets meet AS 4735-2003 for heavy duty connectors. Made in the USA , rated to 40amp continuous and 70 amp peak and will accept wire from 4-8sq mm.
The terminals inside are the connectors are electroplated solid brass to ensure minimal voltage drop and protection against corrosion. The plugs feature a special weatherbeater internal seal to prevent water ingress and a spring guard to provide extra cable protection near the plug.
Look up the numbers for a piccy at ...
www.narva.com.au
Regards
Anthony
FollowupID:
843967
