The telephone socket outlet is 48 to 50V DC so it can be classed as Extra Low Voltage (ELV).
However it doesn't use electrical separation so it isn't SELV.
Some people may think this is OK outside of Zone 3.
But in BS7671 Section 601, the penultimate paragraph of regulation 601-08-01 states that "Outside zones 0, 1, 2 and 3 there shall be no socket outlet other than SELV socket outlets or shaver supply units to BS EN 60742"
Yes OK but I`m not talking about a telephone point (socket) but cable terminating in a junction box within the zones of a bathroom (and touchable/splashable)
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