[Mike Copioli]

Originally Posted by Al Skierkiewicz

Mike,
As there is no rule that covers this, there is nothing on the inspection checklist for this item. I m not aware of any diodes on the motor output of the Spike, I believe there is an MOV, the same as the Victor. Is this what Oz is referring to?

Al,

The Spike has a suppression diode at the motor terminals. This diode clamps the inductive flyback that happens during both the freewheeling period and direction changes.

When a motor is connected directly to the PDP, the flyback that may occur during a breaker trip or simply from hot connecting the load may cause damage to the current sense IC's inside the PDP.

This is why we document this on more than one page in the user manual. CSA's and inspectors should be made aware of this. I would recommend that every inspector and CSA reads the documentation thoroughly.

I have no better way to explain this.