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IP rating of SELV lighting in bathroom zone 2

Farmboy

Regarding figure 8.1 in the OSG (page 94), for the ‘zone 2’ row, the ‘current using equipment’ column appears to make no distinction between ELV/SELV and LV, so:

  • should (12v) SELV downlights (in a ceiling) also be minimum IPX4?
  • what do you think about (12v) MR16 lamps and their connectors being in zone 2 and accessible to a person using the bath (albeit if they stood on the bath edge to reach across to touch them)?

F

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    Re IP rating, I asked because advice given on a forum elsewhere stated that they should be minimum IPX4 ‘or’ be SELV, and because section 1.7 of GN 7 appears to refer to 230v only requiring minimum IPX4, suggesting SELV does not, neither of which seems to concur with section 701.

    IP X4 or IP 4X? - 4X (or 2X) is generally required for shock protection reasons for LV (keeps fingers or knitting needles out), but IPX4 is about liquid ingress and so is more about stopping corrosion, ensuring things don't malfunction or in the days of incandescent lighting ensuring that lamps don't shatter when splashed with water and so on - so would be expected to apply equally to SELV and LV. 

       - Andy.

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    Re IP rating, I asked because advice given on a forum elsewhere stated that they should be minimum IPX4 ‘or’ be SELV, and because section 1.7 of GN 7 appears to refer to 230v only requiring minimum IPX4, suggesting SELV does not, neither of which seems to concur with section 701.

    IP X4 or IP 4X? - 4X (or 2X) is generally required for shock protection reasons for LV (keeps fingers or knitting needles out), but IPX4 is about liquid ingress and so is more about stopping corrosion, ensuring things don't malfunction or in the days of incandescent lighting ensuring that lamps don't shatter when splashed with water and so on - so would be expected to apply equally to SELV and LV. 

       - Andy.

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