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Here's a close up as requested. Apologies for it being a bit fuzzy. Is there any reason why this shouldn't be used to protect a dedicated 4mm TPS circuit for a 3kW spa pool? Thanks for your help. enter image description here Can anyone tell me if this is includes a circuit breaker (20A I'd assume) or if it's just an RCD?

enter image description here

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  • \$\begingroup\$ Could you add a close-up of the little diagram? \$\endgroup\$
    – jonathanjo
    Sep 13, 2023 at 10:04

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FI/LS is the German abbreviation for Fehlerstrom-Leitungsschutzschalter, which means it's a residual current circuit breaker.

Hager: Fehler­strom-Lei­tungs­schutz­schalter FI-LS (RCBO)


Are you also able to tell me which way around line and load are (top/bottom?)

As @Kartman commented:

1,3 are the input, 2,4 the load. The diagram shows the test button across the load terminals.

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  • \$\begingroup\$ Thanks very much Velvel! That's really helpful. Are you also able to tell me which way around line and load are (top/bottom?) Trying to find a way to upload a better close up of diagram for Jonathanjo. \$\endgroup\$
    – Bob
    Sep 13, 2023 at 10:38
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    \$\begingroup\$ 1,3 are the input, 2,4 the load. The diagram shows the test button across the load terminals. \$\endgroup\$
    – Kartman
    Sep 13, 2023 at 12:06
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    \$\begingroup\$ Are you sure, the symbol doesn't have the thermal-magnetic squigles? \$\endgroup\$
    – Jeroen3
    Sep 13, 2023 at 14:27

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