Why would an electrician install a 10 mm twin and earth circuit protected by a B32 MCB for a 8.5 kW shower?
Why would an electrician install a 10 mm twin and earth circuit protected by a B32 MCB for a 8.5 kW shower?
Twenty odd years ago when I signed up for evening classes the head of department said right from the start I would need to do the C&G2400 Design, Erection and Verification, which I did in the fourth year as we had a term off as a break.
The installation courses did not include circuit design, they were exactly what it said they were, installation courses including theory and associated science, so we drew diagras of magnetic fields around conductors and learnt Flemings Rules, but not how to design an electrical circuit.
Not many electricians were taught to design a circuit other than what they did on the Wiring Regulations course, because they never actually did a design course.
A shower circuit is basically a protective device, cable and a switch, so it a pretty poor show if qualified electricians cannot a circuit design calculation for it and determine what those three components need to be rated at, but if they cannot they simply need to use a standard circuit out of the IET Onsite Guide with the correct circuit protective devices.
Twenty odd years ago when I signed up for evening classes the head of department said right from the start I would need to do the C&G2400 Design, Erection and Verification, which I did in the fourth year as we had a term off as a break.
The installation courses did not include circuit design, they were exactly what it said they were, installation courses including theory and associated science, so we drew diagras of magnetic fields around conductors and learnt Flemings Rules, but not how to design an electrical circuit.
Not many electricians were taught to design a circuit other than what they did on the Wiring Regulations course, because they never actually did a design course.
A shower circuit is basically a protective device, cable and a switch, so it a pretty poor show if qualified electricians cannot a circuit design calculation for it and determine what those three components need to be rated at, but if they cannot they simply need to use a standard circuit out of the IET Onsite Guide with the correct circuit protective devices.
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