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So what are these alarming issues.
Discuss Sub panel: Underrated MCB? in the Electrical Forum area at ElectriciansForums.net
The numbers.So what are these alarming issues.
Sorry don't get that.The numbers.
Sorry don't get that.
Unless I have missed it SC there is no mention of tripping circuits so I am still confused what he has been asked to advise on.
Trippings and internally melted sockets. All equipment recently PAT tested and deemed fit for purpose.
Unfortunately, in reality, it's almost always possible for an end user to demand more than their supply is capable of handling, which is why OCPDs are installed. Take a look around your home and ask yourself what would happen if I plugged a 3kW kettle into every socket in my kitchen.
The OCPDs in the board are there to protect the installation wiring and little else and the suppliers OCPD is there to ensure the install as a whole doesn't exceed it's capabilities.
But it's still not clear what's tripping, and when the tripping started. You're just basically pointing the finger at the spark who you've been told designed and installed this 4 years ago, so I'll say this... if these tripping problems were not present when the installation was signed off 4 years ago (if they were, they should have been reported to the original contractor), and only started in say the last 18 months or so I'd suggest the client has changed something and introduced equipment that pushes the demand beyond the capabilities of the installation (as designed 4 years ago based on the information available to the spark at the time).
I actively try and encourage my clients to include some additional capacity 'for the future' but there comes a point where it's not practicable or financially viable. If it was a new business, they possibly had budget constraints so the spark may have been financially impeded. There's so many factors that could have played a part in his decision making process and you can pretty much guarantee you won't get the negative points from the client since they obviously want you on their side.
There you go then the system was badly designed for its intended purpose. State your findings in a Report and job done.The calculations based on projected demand vs the limitations actually implemented by the solution which appear to fall short of what is required in this case. Somebody used the term "likely" earlier on. That's a term used when referring to chance and probability. I don't believe anything should be left to chance where safety is concerned. Demand is easily definable and providing a delivery mechanism that meets the demand is also straight forward. There's no reason why chance should play a part. The numbers in this case don't line up. Too much left to chance. Alarmingly so.
And another side step of my question.
If you go in all guns blazing making statements the installation is not up to scratch it could have serious ramifications for someone's business. Do I think there are some not so good decisions based on what you've said... yes. Do I think there could be mitigating circumstances... maybe. New install for a new business, possibly budgetary constraints and he did the best he could? Who knows. Certainly none of us do.
If this tripping is a recent turn of events, you should perhaps proceed on the basis that things have changed, probably around the time the tripping started.
Could be the installation was perfectly good for what was there 4 years ago, but isn't up to the demands of the business now.
As I said ealier this posting was not smuch a plea for advise or diagnosis. It was a straw poll on my interpretation of the findings. It appears opinions vary which is fine. Thanks for your input.
Sound out of your depth mate tbh.
Reply to Sub panel: Underrated MCB? in the Electrical Forum area at ElectriciansForums.net
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