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The main reason to use 480v control votage is cost / space. If you have no external control devices (ie: remote stop/start, level switches, etc)then why add a CPT? This can be a cost issue when dealing with nema 7 enclosure or if you have limited physical space for the controller.

I have an OEM customer that wants to open / close a proportional valve based directly from a liquid level in a tank. We are proposing an ultra sonic level transmitter giving 4-20 into a PLC or converter card with direct PWM 600ma proportional output to valve. We are proposing the use of a...

That would not be a problem. The fact that the nameplate voltage will be matched removes other issues. The difference you will see is that the motor RPM will be greater. Take the motor nameplate RPM at 50hz and divide by .8333333 This will give you your new rpm ie; 3000 @ 50hz becomes 3600 @...

Yes dyn11 it is 240v. But it goes straight to a 24VDC power supply that is rated 100 to 250 VAC 50/60 hz so I was not to carefull when I stated incoming power. Thanks for all your help and the tables from Bob. I now feel confident that the panel we have allready wired can stay as is.

There would be no problem doing as you suggest. Make sure the connectors match or exceed the incoming voltage / amperage. Keep in mind that most connectors rated at the nameplate volt / amps are not rated to make and break the circuit while under load (you can purchase ones that are, but they...

Thank you Godders. My email is robert@rmgelectrical.com. I would very much appreciate the tables that would confirm XHHW-2 is acceptable for the application in Australia. Thanks again for any support. I have another issue that just came up. Can you or anyone supply the exact color code...

Thanks Ohio Aviator, My biggest problem is that our customer requires documentation to support materials compliance with local standards. For all of the components falling under IEC we were required to supply "declarations of conformity" from the manufacturers. In the US I could...

We are wiring a small control panel for installation in Australia. The panel is 220 VAC input. The panel's controls will be 24VDC limited to 15 amps maximum and will consist of 24VDC power supply,relays, micro plc and terminal strips. My question pertains to the type of wire connecting the...