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Electrical Cables in Contact with EPS
Building Industry Experience Shows
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Plasticisers used to make electrical cable sheathing deteriorate at a function of time and heat. |
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There are no recorded cases where polystyrene has caught fire from shorting in cables. |
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Cables passing through Hitex Polystyrene are normally low load lighting cables that do not get close to the 50 C operating temperatures where plasticisers are likely to migrate. |
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Normal installation practise for inserting cables is making a larger hole than necessary. This reduces the risks. |
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Where cables have been found to have lost their plasticisers the PVC is merely more brittle – but has not disintegrated. |
Where cables are passing through Hitex Polystyrene where the intended operating temperature of the cable is expected to exceed 50 C use either non-plasticised PVC cabling or sheath the wires with either duct tape or rigid conduit.
Do not imbed cables length wise (ie, through the length of a sheet) into Polystyrene insulation unless it is either fully sheathed or non-plasticised PVC cabling.
Page last updated Tuesday, 08 March 2005
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HiTex
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