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What design meansCan the existing installation take a bigger shower?
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Design isn't just picking any cable. It's based on the client's needs and on what's already there. Before adding or altering a circuit, check that the existing installation can:
- carry the additional load
- provide adequate shock protection
- has satisfactory earthing and bonding
Think of design as a chain. The load gives the design current, which decides the protective device, which with the installation method and conditions decides the cable size, which must then pass voltage drop. Example: if a client upgrades a shower from 5 kW to 8 kW, the existing cable may no longer be suitable.
BS 7671 · Appendix 1: British Standards and other standards referred to (about 22 pages) · p.411
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- Building Regs
- PAT
- Fundamental Inspection & Testing
- Initial Verification
- Periodic Inspection & Testing