Motor wiring questi...
 

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[Closed] Motor wiring question (cut the red wire or the blue wire?)

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Have bought a replacement motor for my table saw, direct from the manufacturer and supplied based on the serial number for my machine and it appears everything fits as it should -  however the wiring box on the side labels the various terminals differently  - thats not a problem in itself - what is though is it labels the incoming cables differently too. So...

(this is a single phase installation)

In the existing motor the two wires (other than earth) are labeled 'L1' and 'N', as per usual and the wires this labels refer to are Brown and Blue respectively...  so - presumably its fair to say these are 'Live' and 'Neutral'  - all as you'd expect

However... in the new motor the incoming wires are labelled as 'R' and 'S' - a bit of googling doesn't seem to easily give up how 'R and S' relate to 'L1 and N'. Any ideas?


 
Posted : 13/09/2018 8:22 am
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It’s the black one.

Cut the black.

No, sorry it’s the yellow/green striped one..

Erm, no it’s the black.

HTHs


 
Posted : 13/09/2018 8:33 am
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Thats exactly what they'd want me to think. It would be so much easier if this bloody LED count-down-to-armagedon timer wasn't in the way


 
Posted : 13/09/2018 8:37 am
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Maybe supply and return, so live to S and neutral to R


 
Posted : 13/09/2018 8:43 am
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R,S & T are sometimes used as phase markings instead of L1, L2, L3 on the input side.

Worse that will happen is it spins the wrong way. Try it, if it's wrong, swap them over.


 
Posted : 13/09/2018 8:45 am
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Couldn't you just saw those tables by hand?


 
Posted : 13/09/2018 8:47 am
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R,S & T are sometimes used as phase markings instead of L1, L2, L3 on the input side.

It has a 3 phase wiring option and R,S,T seems to relate to that however theres other jiggery pokery to do with rotation direction which would seem redundant if it was a case of just swapping the wires

The Old

The New


 
Posted : 13/09/2018 9:02 am
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Couldn’t you just saw those tables by hand?

they're Seven Times Tables though - they're the hardest.


 
Posted : 13/09/2018 9:05 am
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My guess is live to R ( bottom left terminal) and Neutral to S ( bottom right)

Keep a fire extinguisher handy and post video.


 
Posted : 13/09/2018 9:06 am
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they’re Seven Times Tables though – they’re the hardest.

Presumably the saw is so you can do division?


 
Posted : 13/09/2018 9:09 am
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From those pics, phase to R1, neutral to S1. If it spins the wrong way, swap the horizontal bars to vertical positions.


 
Posted : 13/09/2018 9:38 am
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Cool - ta


 
Posted : 13/09/2018 9:44 am

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