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Table No. 7. Drill
Size for Connduit Box Holes |
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The junction box should be fixed to the sub-floor (in order to prevent
movement or 'floating' during screeding) the fixings should be provided
with suitable washers. The junction box should be fixed so that the
lid (when fitted) will be level with the adjacent floor finnish. For
uneven sub-floors or where the screed depth exceeds the junction box
height, the box should be provided with suitable packing support under
the base.
Figure No. 36. Typical
Section Showing Junction Box Installed on Hot and Cold Water Distribution
Pipes at Tees |
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| Remember:
No thermal insulation would be necessary where the junction
box is used solely for central heating pipes. |
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To
facilitate the possible removal and replacement of Hep2O®
within the conduit system, conduit pipe should be installed without
joints and should ideally run in straight lines between junction boxes.
Where bends are unavoidable there should be not more than two changes
of direction between adjacent junction boxes.
Conduits carrying cold water pipes should not touch conduits carrying
hot water or central heating pipes. When running conduits within ßoor
screeds the recommended gap between such conduits should not be less
than 50mm (see Figure No. 37) in order
to prevent the warming of cold water.
The conduit system should not contain unused water pipes which remain
connected to water systems. Redundant pipework will result in water
stagnation which would pose a risk to health. |
