Solving the Puzzle - Installing Double Pole RCBOS, MCBs & RCDs?
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- Опубликовано: 1 мар 2023
- James Curnow delves into the wiring regulations to help you identify when a double pole protective device should be installed. He also reveals design considerations that need careful attention around applications, earthing and load variations.
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Learn more about EV chargers and double pole devices
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I'm an electrician in France. Just for interest: all circuits in this country are protected by double pole RCDs and MCBs: single pole examples don't exist.
Great info thanks Richard
I suspect that in time, the UK will do the same?
Same here in South Africa. I've never seen a single pole RCD. Here we call them Earth Leakages.
I don't think it's quite so important in the UK, since the socket preserves polarity
It's the same here in Spain.
Nice to see you with an efixx shirt James!! Keep up the good work
👏👍
Excellent informative video
Very informative 👏 👌
That's raised some points 👍
Electrician from Argentina here, we're obligated to use double pole equipment for everything, only exception is lighting circuits but it's still recommended, all circuits must be separate as there's a danger of backflow trough the neutral wire into your "off" circuit. been there, its a not so fun tingle. im always left confused as to why almost all european panels i see are mostly single pole with bonded neutrals on a bar, when our normatives derive directly from IEC ones.
What is the standard earthing system in Argentina?
In the Netherlands we switch the neutrals.
I think the answer to that is the neutral in the UK is nearly always connected to earth so is always at 0v.
nice and detailed explanation
Can you explain the difference in a domestic setting single phase instalation between Double Pole and SinglePole with switched Neutral?
Good subjects but lack of pictures, diagrams and examples
hello guys, a warm greeting from Italy, your channel is just great! In our country we generally use 2-pole circuit breakers, the distribution system in the residential sector is T-T. In the UK I still haven't figured out the nature of distribution, what kind of distribution is it?
always keep it up on your channel, you are bringing wonderful content. Hi everyone.
Thanks for the feedback - We’ll be exploring some installations in the South of Italy next month. Uk is mainly TNCS for properties built in the last 30-40 years. TT is still found in rural properties. Older town houses TNS.
@@efixx nice!
France mandates that all disconnectors in the main panels are _double pole._ This means they use twin L&N busbars (called a comb). It makes it all so much neater inside the main panel and safer. The British are behind. Schneider (French) sell DP RCBOs and RCDs using the comb busbar in the UK, emulating the French system. In fact better as the main panels have to be metal in he UK.
Worth noting that some RCDs and RCBOs have fixed neutral, and that RCBOs can be referred to as "double pole" whether they have over current production on the neutral pole or not. Also, those caravans shown in the video are transportable units rather than caravans for regs purposes. Caravans are driven or towed with their wheels on the road.
I m confused about Double Pole Circuit Breaker. I have seen a lot of pictures/videos which use one hot/live wire and one neutral wire as input and the corresponding output for each of them, whereas when I see the setup in the service panel box, it doesnt have the neutral input into the breaker itself, it takes two hot/live wires (from the service panel buses/two phases ) and two outputs accordingly. I am confused actually.
Double pole MCBs / RCDs rcbos should really be used as standard tbf. So many neutral to earth faults when they are commoned up when Rcd protects multiple circuits
Great.... Just as confused as I was before. They don't word it nicely in the regs do they
Is a switched neutral device true double pole?
I think double pole is only when there's protection in both poles. If the device only has a switch for the neutral but no protection, I don't think it can be considered double pole.
@@1idd0kun Can you clarify what you mean by ''protection'' please? So what does that make a 20A double pole switch?
I've never seen a reduced sized neutral conductor in a single phase or 3 phase installation.?? Where is regulation saying that it's acceptable to install reduced sized neutral conductors?
It is allowed if neutral currents are guaranteed to be lower. Can’t remember the regulation. Consider 3ph AC motor circuits which are perfectly balanced and therefore no neutral is required at all.
Ok
I wish you could have explained in plain English instead of reading directly from the regs.