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BRIGHT SPARKS !
GOT A SPARE HALF HOUR ? PUT YOUR LUNCH BREAK TO GOOD USE WITH SOME PUZZLING BRAIN TRAINING .
NOT DONE A SUDOKU BEFORE ?
1
A sudoku is a grid of nine by nine squares or cells , which has been subdivided into nine subgrids or regions of three by three cells .
The objective of
2 sudoku is to enter a digit from 1 through 9 in each cell , in such a way that each horizontal row contains each digit exactly once ; each vertical column contains each digit exactly once ; and each subgrid or region contains each digit exactly once .
3
In the puzzle here , several digits have already been entered ( the ‘ givens ’); these may not be changed . Your job is to fill the remainder of the grid with digits according to the listed rules .
Warning : In spite of
4 the game ’ s apparent simplicity , sudoku can be highly addictive . For the solution , see gemcell . com . au / competitions .
THE CABLE GUY TECH GUIDE
What cables can be used in contact with polystyrene freezer insulation ?
The PVC compounds used to insulate and sheath electrical cables used in buildings are a mixture of PVC resin , stabilisers , fillers and plasticiser oil . Polystyrene foam used as insulation in many cold rooms and freezer installations can draw the plasticiser out of the PVC sheathed cable and result in the cable becoming more brittle over time .
Despite low-migration PVC compounds sometimes being used in cables , they are not likely to be a feature of standard cables used to provide power and lighting to the rest of the building . As a result , standard PVC cables are not recommended to be selected in circuits used to provide power to polystyrene insulation cold rooms .
If a PVC cable needs to be used , it is recommended that it be installed in conduit , allowing the plasticised cable sheath to be physically separated from the polystyrene insulation .
Nexans Olex also manufactures and supplies the fire resistant Alsecure Plus and low fire hazard Envirolex range which are both made entirely with PVC-free materials . Alongside the many benefits over standard PVC cables , these are suitable for installation in contact with polystyrene freezer insulation .
Envirolex can be supplied in a circular single , multicore or as a Flat TPS configuration , so regardless of the application , there is likely to be a Nexans Olex product that meets the requirements .
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