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nickblake
A little while ago there was a thread regarding green liquid / goo on cables and accessories ,here a bit more info about it, ever since the 1960's green goo has effected cables. The insulation on twin and earth is made of PVC to which a plasticiser was added during manufacture to make the cable pliable to aid cable installation,green goo is a side effect formed during the chemical reaction between the plasticiser of the insulation and the copper conductor when it nears its maximum cable temperature 70 deg C ,at such temperatures the p-lasticiser can leek from the cable causing the cable insulation to become sticky to touch initially but as the leaching continues the cable insulation becomes hard and brittleif the green goo is restricted to the leaching of the plasticiser although unsightly the electrical integrety of the insulation will not be reduced if the cable is not desturbed , how ever if the green goo is severe it can resault in the cable insulation becomming brittle where by the insulation quality may significantly become inpaired which could lead to electrical faults including the risk of electrical fires ,an insulation test should be carried out on any effected cables , unfortunatly there are no solutions to this problem and the only prctical way of dealing with this is a complete rewire as tempruary repairs may still become effected , contuary to belief the green goo is not carcingen but being in contact with it may causeill health effects such as dermititus and or rashes so precautions should be made to avoiude contact with hands etc , and all gloves etc should be disposed of in a safe way , all personnell should wash their hands if they become in contact with any goo ,, hope this is of use .. full article available from the ESC switched on heres the link Our Magazine | Electrical Safety Council
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