Very good explanation of the functioning of an SPD. They have come down in price a lot now. Even though a lot of them have plugin modules, I struggle to find where I can purchase just the module on its own. Usually purchase the complete unit and bin the base.
Thank you for your very well presented video on SPD It advises informers and trains the not so well informed whom have not attended colleges recently and new products are entering the market
the conveyor belt analogy was brief and brilliant, can i ask if you have done an explanation video for 3 phase surge maximum conductor lengths as there seems to be to much confusion out there on whether all 3 conductors should be under 1m combined as apposed to only one of the phases needing to be 500mm, I hope that makes sense, good shout as always👍
How are you installing the device? You can get complete 3 phase SPDs, which will only have one outgoing earth connection, that you take to a solid earth point with as short a run as possible. If you are installing 3 individual single phase devices, then I would give each one its own cable to earth or use a short piece of busbar to link all three earths and then take a common cable from the busbar to the earth. I wouldn't daisy chain the earth connections on the devices and take a cable to earth from the last one in the chain.
What a really clear explanation of how an SPD works. I have been fitting them for some time now but was not clear on how they worked. One question though, I know their life expectancy will vary from area to area but what is the average realist life expectance of an SPD?
Life expectancy of an SPD is based upon how much energy it has to dissipate, which is a cumulative effect. On a low risk domestic installation I would expect then to easily last 10 years between EICRs. On a higher risk industrial installation, you can have major events that could eat away 10% of its life at a time and may need replacing in 2 or 3 years. But generally, they just get installed and forgotten about.
Please i want to a you this question; what's the order in which you should arrange your circuit breaker in your consumer unit. should it be from the lowest breaker to the highest or highest breaker to the lowest and why... Thanks
Can I ask if the spd has a 32A circuit breaker up stream and the spd device trips. Surely there should be an aux contact wired to annunciate that the breaker has tripped . Otherwise the tripped state of the spd will remain undetected?
Hi sir, I have three phase DB feed 12 small consumer units with RCD’s for small offices I want to put SPD so what is the best way to put it in the DB or in each of the consumer units Thank u
3 phase SPDs are available for distribution boards and will be more economical on time and money than installing in twelve consumer units. If there is no room in the DB, the SPD can be installed in an external box, just keep the leads as short and straight as possible, avoid making loops with the conductors.
@@learnelectrics4402 I sir , I have Niceic assignment and I want to be sure about it please The 12 officers consumer units protected by RCD type B and the new regulations says if the consumer units has RCD Type B we must put SPD So what should I do now I put SPD in DB or in consumer units Thanks for help
The world's best teacher thanks sir
Great feedback Kabanda, thank you, really appreciated. Dave.
Very good explanation of the functioning of an SPD. They have come down in price a lot now. Even though a lot of them have plugin modules, I struggle to find where I can purchase just the module on its own. Usually purchase the complete unit and bin the base.
That's sometimes the problem. These things should be available but its not cost effective for a wholesaler to stock them. Pity.
I can't miss this lesson
Thanks for watching, lots more to come.
Thanks again Dave, always educative and informative.
Thank you Anthony, glad you enjoyed it.
Thank you for your very well presented video on SPD
It advises informers and trains the not so well informed whom have not attended colleges recently and new products are entering the market
Glad it was helpful and thanks for watching.
Lovely video thanks!
Very informative and help to costumers to understand why we install as a basic protection
Thank you, great feedback and thanks for watching.
Superb video again Dave. Keep them coming
I certainly will Andrew, thanks for watching. Dave.
the conveyor belt analogy was brief and brilliant, can i ask if you have done an explanation video for 3 phase surge maximum conductor lengths as there seems to be to much confusion out there on whether all 3 conductors should be under 1m combined as apposed to only one of the phases needing to be 500mm, I hope that makes sense, good shout as always👍
How are you installing the device? You can get complete 3 phase SPDs, which will only have one outgoing earth connection, that you take to a solid earth point with as short a run as possible. If you are installing 3 individual single phase devices, then I would give each one its own cable to earth or use a short piece of busbar to link all three earths and then take a common cable from the busbar to the earth. I wouldn't daisy chain the earth connections on the devices and take a cable to earth from the last one in the chain.
See reply below. Thanks for watching, appreciated. Dave.
Thanks for the reply. Dave.
What a really clear explanation of how an SPD works. I have been fitting them for some time now but was not clear on how they worked. One question though, I know their life expectancy will vary from area to area but what is the average realist life expectance of an SPD?
Life expectancy of an SPD is based upon how much energy it has to dissipate, which is a cumulative effect. On a low risk domestic installation I would expect then to easily last 10 years between EICRs. On a higher risk industrial installation, you can have major events that could eat away 10% of its life at a time and may need replacing in 2 or 3 years. But generally, they just get installed and forgotten about.
See reply below. Thanks for watching.
Thank you, great reply.
Wish you could do a series about electrical portfolios.
Added to the list. Dave.
Thank you Sir. That would be very helpful
Please i want to a you this question; what's the order in which you should arrange your circuit breaker in your consumer unit. should it be from the lowest breaker to the highest or highest breaker to the lowest and why... Thanks
See above Daniel, thanks for watching.
Simple understandable explanation. Super.
Thanks for that, appreciated. Dave.
Can I ask if the spd has a 32A circuit breaker up stream and the spd device trips. Surely there should be an aux contact wired to annunciate that the breaker has tripped . Otherwise the tripped state of the spd will remain undetected?
That's a good point. Thanks for watching. Dave.
HI thanks again what code should be EICR if no install SPD installed thanks
Usually a C3 improvement recommended. Thanks for watching.
Do SPDs protect from long duration brownouts (over-voltage due to loss of neutral in a 3-phase system)?
If a voltage exceeds the threshold of the SPD it will operate. Hope this helps. Dave.
We want video for AM2 assessment
Its on the list. Thanks for supporting the channel. Dave.
Need info on a three phase spd 230-400 volts ...
Comments noted, I've put it on the list. Thanks for watching. Dave.
Hi sir, I have three phase DB feed 12 small consumer units with RCD’s for small offices I want to put SPD so what is the best way to put it in the DB or in each of the consumer units
Thank u
3 phase SPDs are available for distribution boards and will be more economical on time and money than installing in twelve consumer units. If there is no room in the DB, the SPD can be installed in an external box, just keep the leads as short and straight as possible, avoid making loops with the conductors.
@@learnelectrics4402 Thank you very much
I appreciate your help
@@learnelectrics4402
I sir , I have Niceic assignment and I want to be sure about it please
The 12 officers consumer units protected by RCD type B and the new regulations says if the consumer units has RCD Type B we must put SPD
So what should I do now I put SPD in DB or in consumer units
Thanks for help
I'm here again
Glad that you are Daniel. Stay on the channel and keep learning, its a good trade.