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intumescent strip in Three Phase DB

Steven Whitehead

I have an three phase distribution board in a school  with a holes cut in the top for the LSF /PVC/PVC cables which goes into plastic trunking , does anyone know if i am correct in asking for  intumescent strip to be fitted and which regulation would cover this to stop the spread of fire , the board is located within a fire rated cupboard , but still believe its good practice to keep within the DB ?    

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    AFAIK there's no particular requirement for fire containment for DBs in schools - for domestics (only) BS 7671 demands CUs are either manufactured from non-combustible material (steel) or enclosed in the same - but makes no particular demands on fire stopping holes even then. Of course designers are free to specify to a higher standard than BS 7671's requirement if they think fit for the particular circumstance, customers may well have their own particular demands too (perhaps as part of a wider fire risk assessment for example), but otherwise I think it's just a matter of the general principles of good workmanship and following manufacturer's instructions.

       - Andy.

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    AFAIK there's no particular requirement for fire containment for DBs in schools - for domestics (only) BS 7671 demands CUs are either manufactured from non-combustible material (steel) or enclosed in the same - but makes no particular demands on fire stopping holes even then. Of course designers are free to specify to a higher standard than BS 7671's requirement if they think fit for the particular circumstance, customers may well have their own particular demands too (perhaps as part of a wider fire risk assessment for example), but otherwise I think it's just a matter of the general principles of good workmanship and following manufacturer's instructions.

       - Andy.

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