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Discuss spd on 3ph distribution board in the Industrial Electrician Talk area at ElectrciansForums.co.uk.

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  1. Simon-0116
    Offline

    Simon-0116 Regular EF Member

    Location:
    Notts / yorkshire
    Priced a job to change old 3ph board from pictures alone. No the firm so jobs good.
    Get there and situation is no spd fitted on existing. So I was going to fit one to my new db in trunking at side of board fed of 32a breaker.
    Will this act / cover / work for the whole site.
    Layout is main switch with 2 outgoing sets of 3ph /n tails to 2 dbs next to each other.

    Both boards will be on at all times, as only problem I can see is if db was turned off.
    Or am I looking into it too much. Customer wants it right and understands if there is a better way.
     
  2. Rob
    Offline

    Rob Control System Engineer Respected Member

    Location:
    USA/UK
    You have different types of spd than need fitting in different places within the installation.
     
    • Like Like x 2
  3. Robson689
    Offline

    Robson689 Regular EF Member

    Location:
    UK
    You could subcontract it to a specialist who will survey & install. Some LP firms offer this service.
     
    • Agree Agree x 2
  4. Simon-0116
    Offline

    Simon-0116 Regular EF Member

    Location:
    Notts / yorkshire
    Was fitting a type 2 as understand ok for mains or in db fed from breaker.
     
  5. Pete999
    Offline

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    Do you have the knowledge and where with all to undertake a job like this?
     
  6. Vortigern
    Offline

    Vortigern Regular EF Member

    Location:
    England
    Business Name:
    F.H. Electrical
    Contact the manufacturer for a schematic/plan.
     
  7. Simon-0116
    Offline

    Simon-0116 Regular EF Member

    Location:
    Notts / yorkshire
    Yes got the knowledge experience, just wondered what others would do in this situation. Only asking and sorry if I have said something wrong
     
  8. westward10
    Offline

    westward10 In echoed steps I walk across an empty dream. Staff Member Moderator

    Location:
    Northamptonshire
    I wouldn't put it within the trunking I would use a separate enclosure so the indicators can be viewed.
     
    • Agree Agree x 1
  9. Pete999
    Offline

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    No Mate you said or done nothing wrong, just wondering if you should be tinkering with this as your profile is a bit thin on the info.
    Edit already posted something similar
     
  10. Simon-0116
    Offline

    Simon-0116 Regular EF Member

    Location:
    Notts / yorkshire
    Yes Isorry should have worded it better, it's going in a small steel enclosure mounted on the trunking.
     
  11. Carl S
    Offline

    Carl S Active EF Member

    Location:
    Stockport
    I could go to any job almost 99.9999% sure there won’t be a SPD fitted. Why do you think your replacement DB needs a SPD? Have you done a risk assessment?
     
    • Agree Agree x 1
  12. Pete999
    Offline

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    What he said ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     
  13. Simon-0116
    Offline

    Simon-0116 Regular EF Member

    Location:
    Notts / yorkshire
    Only risk assesment/ check I've used is schnider or wylex, which in my understanding if can lead to disturbance in commercial industrial then one needs fitting. Domestic I thought if value of electrical goods is 4x cost of spd as a rule fit one. Think that was beema.

    What I wanted to no was if one in a db will do / cover both dbs instead of messing about splitting main tails etc.
     
  14. Pete999
    Offline

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    If you take the time to look in the OSG Page41 Table 3.7.3 figure 3.7.2.2, it tells you all about the three types of SPD and how to choose which type.
    In fact read all of Section 3 page 31 in the sections entirety, this should give you an insight into Protection.
     
  15. westward10
    Offline

    westward10 In echoed steps I walk across an empty dream. Staff Member Moderator

    Location:
    Northamptonshire
    One of the best guides is one by Hager. It normally pops up on Google searches, would put up a link if I were at home.
     
    • Like Like x 1
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