Section 408.11281. Resistance welding generally.

(1) An inspection shall be  made  of  a  resistance  welding machine not less than yearly and records maintained of the findings and action taken. In addition, the operator shall report any defects to his or her supervisor. A defect which could cause injury shall be repaired before the machine is placed in operation.

(2)    Each resistance welding operation shall be analyzed and safeguards and personal protective equipment shall be used where a hazard is found.

(3)   The operator of a resistance welding machine and nearby employees shall be protected from flying sparks by shields, curtains, goggles, or a combination of a face shield and safety glasses  as prescribed in R 408.11211.

(4)   A resistance welding machine shall be installed by a   qualified employee under the direction of a licensed electrician or supervised by  a welding engineer.

(5)   A disconnect switch, circuit breaker, or circuit interrupter shall be installed on or near the machine so that power can  be  shut  off   and locked out when the machine needs servicing.

(6)   A pair of ignitron tubes used in resistance welding equipment shall be equipped with a thermal protection switch.  When  used  in  a   series connected water line, a single switch shall be sufficient   if  related   to the downstream tube.

(7)   Controls for automatic, air, or  hydraulic  clamps  and  resistance machines shall be located or guarded to prevent accidental activation.

(8)   A foot control for a resistance welder, other than that used to apply weld pressure, shall be guarded to prevent accidental activation.

History: 1979 AC; 1983 AACS; 1988 AACS.