Mastering Electrical Design - Don't Miss This Step!

When designing an electrical circuit it's common practice to go piling into calculations to figure out breaker ratings, cable sizes and similar.

However there's some important information to gather before you go down that road.

We take a look into the various books that give advice on electrical design, including BS 7671 The Wiring Regulations, the On-Site Guide and The Electrical Installation Design Guide published by the IET.

Take a dive with Joe into the exciting world of electrical design in this series of videos that will help you if you're just starting out in this area at college or work. Even if you've been an electrician for years, there's something for everyone in this series of videos.

🕐 Chapters 🕕
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00:00 What IS the first step in designing an electrical circuit?
00:47 Helpful books for electrical design
01:09 The design brief, how to supply an electric boiler
01:18 Don't make this mistake with electrical design
01:27 The key question when starting an electrical design
01:52 What kind of earthing arrangement do I have?
02:15 Typical maximum Ze values for earthing arrangements
02:26 Updated guidance for maximum Ze values for earthing arrangements
03:05 Why do we need to know the value of Ze for an installation?
03:17 What is the nominal voltage and tolerance for a single phase circuit in the UK?
04:04 Do we need to calculate the prospective fault current for a circuit?
04:55 What is the prospective fault current rating for an MCB?
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❌ This content on this channel is for electrical professionals.❌ ==================================
📹 Presented by
Joe Robinson - Technical Editor
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#electricaldesign #electricians #electricalinstallation

[electrician]

Awesome to see people focusing on design. Keep up the great work and I will watch with interest!

[ivanbuckingham]

You should make a video explaining what CPD means. I've been watching your channel for over a year (probably 2 now) and although I have learnt loads from you I still don't know what CPC is

[angelofranklin]

Dear Joe, Have to done any more avanced design? ifso can you plese add a link thank you.

[travoltasbiplane]

So yeah enclosures to 61439 can handle 16kA if backed up satisfactorily. Its the thermal constraints of the conductors... Particularly with mcbs thats the real concern at higher fault currents. Especially when t&e is launched in without a second thought.

[dannymort]

Seems strange we use the c min value of 218.5V in the calculation for earth fault values when a minimum permissable voltage value in the esqcr regulations is 216v

[TheEulerID]

It's insane to consider 16 kA in any domestic environment. It's simply not a number that will ever be approached. I wonder if they standards people are just carrying over some extreme numbers from industrial settings.