Outline.
Although you can increase the number of sockets in a room by converting single sockets to doubles, there may be times when you need an extra socket where none exist already. In this case, you'll need to add a spur from a ring circuit. You can either run this from an existing socket, or from a junction box that's connected into the cable run of a suitable ring circuit. The circuit must have RCD protection.
Material Requirement.
1." Ring Circuits" or " Radial Circuits" use, 2.5 mm2 [called as 1.5 mm squared] Cross sectioned double insulated Cu [Copper] Cables [Cu/PVC/PVC] are used for the Phase [Live ] and the Neutral cables.
2. Earth [Ground ]cable also should be 2.5mm2 single insulated Cu[Copper] Cables [Cu/PVC] for both Industrial or Residential type of applications.
3. Cable lengths for the above circuits will be such that voltage drop along the cables will be with in the approved limits of 10% of Supply Voltage.
4. PVC Boxes to install the 2 x 13A Switched Socket outlets
5. 2 x 13A Switched Socket outlets [Single or Double]
6. MCB 32A -01 nos [ from a Distribution Board already installed] for Ring Circuits
7. MCB 20A -01 nos [ from a Distribution Board already installed] for Radial Circuits
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