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This is what the regs say about protection for safety and the application of protective measures against electric shock.
"702.410.3.4.3 Zone 2
One or more of the following protective measures shall be employed:
(i) SELV (Section 414), the source for SELV being installed outside zones 0, 1 and 2. However, it is permitted to install the source for SELV in zone 2 if its supply circuit is protected by an RCD having the characteristics specified in Regulation 415.1.1
(ii) Automatic disconnection of supply (Section 411), using an RCD having the characteristics specified in Regulation 415.1.1 NOTE: Where a PME earthing facility is used as the means of earthing for the electrical installation of a swimming pool or other basin, it is recommended that an earth mat or earth electrode of suitably low resistance, e.g. 20 ohms or less, be installed and connected to the supplementary protective equipotential bonding.
(iii) Electrical separation (Section 413), the source for electrical separation supplying only one item of current using equipment and being installed outside zones 0, 1 and 2. However, it is permitted to install the source in zone 2 if its supply circuit is protected by an RCD having the characteristics specified in Regulation 415.1.1."
If you're worried about things like IP rating, you can get away with IPX2 fittings so you don't even need anything special unless it's outside or you're going to jetwash them.
"702.410.3.4.3 Zone 2
One or more of the following protective measures shall be employed:
(i) SELV (Section 414), the source for SELV being installed outside zones 0, 1 and 2. However, it is permitted to install the source for SELV in zone 2 if its supply circuit is protected by an RCD having the characteristics specified in Regulation 415.1.1
(ii) Automatic disconnection of supply (Section 411), using an RCD having the characteristics specified in Regulation 415.1.1 NOTE: Where a PME earthing facility is used as the means of earthing for the electrical installation of a swimming pool or other basin, it is recommended that an earth mat or earth electrode of suitably low resistance, e.g. 20 ohms or less, be installed and connected to the supplementary protective equipotential bonding.
(iii) Electrical separation (Section 413), the source for electrical separation supplying only one item of current using equipment and being installed outside zones 0, 1 and 2. However, it is permitted to install the source in zone 2 if its supply circuit is protected by an RCD having the characteristics specified in Regulation 415.1.1."
If you're worried about things like IP rating, you can get away with IPX2 fittings so you don't even need anything special unless it's outside or you're going to jetwash them.