Wiring motor starter with control station for jointer

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Forum topic by BMichs75 posted 04-21-2019 02:11 AM 2234 views 0 times favorited 3 replies Add to Favorites Watch
View BMichs75's profile


102 posts in 2942 days

04-21-2019 02:11 AM

Topic tags/keywords: electrical wiring jointer northfield

Needing some advice and help from the electrical gurus out there. I recently purchased a 12in MD Northfield jointer at an auction for a great price. Only catch was there was no motor or electricals on the unit as it left the northfield factory without them and was run under lineshaft power for the last 18 years. So I contacted Jeff and Northfield and he let me know everything that i needed for the unit. I purchased a lot of the parts off northfield but got a much cheaper price for the motor and starter/control station elsewhere (same ones he recommended).

I am comfortable with electrical work but I cannot for the life of me figure out the wiring for where the control station is wired into the starter. Included are some pictures
for reference.

The starter/coil I am using is a Siemens Furnas 3phase (it is wired for single phase by looping L3 into T2) and a Siemens furnas 1phase NC/NO control station.

The top picture shows the view of the starter with the line power coming in on the bottom left and the control station wiring coming into the bottom center. (Not shown: power to the motor)

The second picture shows the control station and how it is currently wired.

The third picture shows a zoomed in look at the starter wired to line power.

My questions:
Does the wiring on the control unit look right?
Where would the wires from the control unit insert into the starter?

-- Brandon

3 replies so far

View MrUnix's profile


8801 posts in 3483 days

#1 posted 04-21-2019 02:55 AM

Can’t tell from that picture… but typically the control station connects to terminals 1, 2 and 3… with 1 being either T1 (full voltage coil) or XF (low voltage coil). There should have been a wiring diagram supplied with the starter… but here is one I found on the net that is probably correct:

Your control station appears to be missing a wire. You need three, and I only see two in yours (plus a ground).


-- Brad in FL - In Dog I trust... everything else is questionable

View BMichs75's profile


102 posts in 2942 days

#2 posted 04-21-2019 03:41 PM

The control needs a 3rd wire even though its single phase?

-- Brandon

View ibewjon's profile


2680 posts in 4077 days

#3 posted 04-21-2019 04:53 PM

A stop start requires 3 wires, and please change the white to any color but green as it is not a neutral. The stop start diagram above is correct, with contact M being an auxiliary contact on the starter that closes when start button is closed. That contact stays closed after start is released, holding the power contacts closed until stop is pushed, opening the circut. M contact is labeled 2 & 3 on starter diagram above.

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