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I'm trying to use this delay timer to control an exhaust fan. I have a 3 pin connection (with earthing wire) powering this fan and it works fine.

If I have to insert this delay timer module in between the fan and socket, what do I connect the earthing wire to ? Can I leave it connected to the fan's earthing wire directly (as it is now) and use the hot and neutral to connect to this module or should I be looking for another module supporting an earthing wire ?

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You must connect any existing earth ground wires directly to the earth ground connection. Not doing so could be a violation of safety regulations and/or civil code.

While you're at it, put that timer in a proper box. As it is, it is very easy to come into contact with a hot connection (which is a violation of the above in its own right).

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  • \$\begingroup\$ Thanks Ignacio.. So can I leave the two earth wires connected as it is and interface the hot, neutral wires to the timer ? (sorry if this is repetitive.. just want to be sure :) ) \$\endgroup\$ – ivymike Dec 4 '14 at 9:23
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    \$\begingroup\$ Yes. And make sure that you've identified the hot wire correctly, since that is the one that must be switched by the relay. \$\endgroup\$ – Ignacio Vazquez-Abrams Dec 4 '14 at 9:25

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