wiring mains up to garrard 401

[hifinutter]

i am looking for the position of the 3 wires in the mains connecting block on a garrard 401 , anyone got a pic cheers

 

[russ abbott - royds broth]

 

[AGrail]

401 connector block

 

[SergeAuckland]

I have my 401 wired this way, as recommended in the manual, but this means that the turntable is earthed to the amplifier using the arm earth cable. That's more or less OK if the amplifier is earthed, but with a double-insulated amplifier that means there's no safety earth on the turntable. Any electrician like to comment?

PS this isn't confined to the 401, my BD1and GL75 turntables are earthed the same way.

S

 

[hifinutter]

http://www.google.co.uk/imgres?sa=X&espv=210&es_sm=93&biw=1366&bih=666&tbm=isch&tbnid=r1CuxZulmWYCVM:&imgrefurl=http://www.pinkfishmedia.net/forum/showthread.php%3Ft%3D138836%26page%3D4&docid=iM9jaTDppzx9cM&imgurl=http://i1204.photobucket.com/albums/bb412/andreweastham/IMG_3312.jpg&w=1024&h=768&ei=8wmRUowzjPCFB8GMgBg&zoom=1&ved=1t:3588,r:5,s:0,i:98&iact=rc&page=1&tbnh=187&tbnw=218&start=0&ndsp=17&tx=35&ty=180

this pic shows the earth in the middle pin is this ok

 

[paulf-2007]

I have an earth on the chassis back to the mains plug, no earth from the arm, what is the point of an earth to the arm?

 

[SergeAuckland]

I have an earth on the chassis back to the mains plug, no earth from the arm, what is the point of an earth to the arm?

That makes a lot more sense. The point of earthing the arm is so that it acts as an electrostatic screen for the arm wiring, and that the arm is at the same potential as the amplifier's audio ground. In my view, the turntable should be earthed to mains safety earth, and the arm earthed to the amplifier, and no connection made between the arm metalwork and the turntable, but that's not how most turntables are earthed. Wonder why.

S

 

[divedeepdog]

That makes a lot more sense. The point of earthing the arm is so that it acts as an electrostatic screen for the arm wiring, and that the arm is at the same potential as the amplifier's audio ground. In my view, the turntable should be earthed to mains safety earth, and the arm earthed to the amplifier, and no connection made between the arm metalwork and the turntable, but that's not how most turntables are earthed. Wonder why.S

+2, 3 core mains lead, motor earthed :^

 

[paulf-2007]

On both my idler tt's the arms are connected to the wood plinths only