Discuss SPD protection commercial and industrial in the Electrical Forum area at ElectriciansForums.net

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Hi

Trying to sort an argument here, am I right in saying that ALL work including altering existing circuits in commercial and industrial installations requires SPD protection unless a risk assessment is completed.

The only exception would be a direct replacement for maintenance purposes?

Thanks
 
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Julie.

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Hi

Trying to sort an argument here, am I right in saying that ALL work including altering existing circuits in commercial and industrial installations requires SPD protection unless a risk assessment is completed.

The only exception would be a direct replacement for maintenance purposes?

Thanks
Yes.
Although the wording is the other way around, you do an assessment to determine if spd is required or not. If no assessment is made then spd must be fitted.

On residential no assessment is required, and spd may be omitted if the customer indicates the cost doesn't justify the cost of consequence

As to ALL work - strictly yes, but generally minor works tend not to be.
 

pc1966

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As to ALL work - strictly yes, but generally minor works tend not to be.
I guess at some point there will be a debate about just where the crossover is:
  • If you were replacing a broken socket or failed lamp, you would probably not modify the CU to include SPD (or anything else, unless some C1/C2 is apparent, like its an outdoor socket and no RCD).
  • Adding a new circuit, would it merit SPD? Maybe at least an disclaimer/risk assessment with the custimer before proceeding without SPD?
  • Putting in a new CU/DB and it is almost certainly going to have SPD included.
 

Julie.

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I guess at some point there will be a debate about just where the crossover is:
  • If you were replacing a broken socket or failed lamp, you would probably not modify the CU to include SPD (or anything else, unless some C1/C2 is apparent, like its an outdoor socket and no RCD).
  • Adding a new circuit, would it merit SPD? Maybe at least an disclaimer/risk assessment with the custimer before proceeding without SPD?
  • Putting in a new CU/DB and it is almost certainly going to have SPD included.
That's the issue/point really, and it applies to all installations, and to all aspects of the regs, not just spd.

Anything new must be to the latest, but that means sometimes a much larger scope of work than the additional bit under consideration.

Where does one draw the line....?

(Answers on the back of a postage stamp)
 
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I had a chat to NIC technical about this and they advised if its a client that you have contract with to possibly set up a blanket risk assessment that will base the installation of SPD on the value of the job, so small minor works no SPD, DB replacements and large new installs include SPD. Seems logical to keep you compliant
 

Julie.

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do you want to protect your electrical items from damage yes or no. If they say yes, do they get guarantee and from whom......
I would never suggest a SPD protects (in spite of the name) - Extension leads (with SPD) for example, talk about reducing the potential impact of surges.

Same with SPD, they reduce the possibility of damage due to a surge, not eliminate it.

If you advise a customer that fitting an SPD will "protect your items from damage" then it would be you making the guarantee.
 

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