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Old 5th January 2015, 12:03 PM   #1
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Join Date: Feb 2003
Location: Toronto
Default How to hookup an illuminated power switch or button

Hi. I am wondering how to install a front power switch to an amp.

Switch/Button
For safety I have read that a DPST type switch is recommended to isolate line and neutral. Switch data sheet: http://www.nkkswitches.com/pdf/cwscilluminated.pdf

Power entry module
The back power entry unit has a power rocker and dual fuses for switching between 115v and 230v. The back lugs are 1 earth, 2 line, 2 neutral. I'm assuming the twin lines are to connect to twin 115v primaries of a transformer so that they can be switched between 115v and 230v. Data sheet: http://www.farnell.com/datasheets/1511815.pdf

What I'm not clear is how to actually wire the switch between the power entry module and the transformer. And how does one supply the switch LED power from the transformer? I count 7 lugs on the back of the switch.
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Old 8th January 2015, 01:06 PM   #2
AndrewT is offline AndrewT  Scotland
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Join Date: Jul 2004
Location: Scottish Borders
The 7 lugs on the back of the voltage conversion switch confirms the complexity of what needs to be inside that specialised switch.

Your front panel switch can directly switch the mains input, or trigger a relay that switches the mains input.

You need to understand how to wire up the converter switch and how to wire up the ON/OFF switch. Don't take chances !

Think this through very carefully.

In the meantime build a Mains Bulb Tester and use it to power up every mains powered project and every modification of a mains powered project.
Only AFTER you have proved that your wiring is correct do you risk powering direct to the mains and then you must use an appropriately rated mains fuse.
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