Sec.29-232-44. Electric steam generators

Electric boilers shall bear the Underwriters' Laboratories label on the completed unit or assembly by the manufacturer. This label shall be in addition to the code symbol requirements of the A.S.M.E. All appliances required for electric steam generators shall be attached in accordance with the following rules:

(a) A cable at least as large as one of the incoming power lines to the generator shall be provided for grounding the generator shell. This cable shall be permanently fastened on some part of the generator and shall be grounded in an approved manner.

(b) A suitable screen or guard shall be provided around high tension bushings and a sign posted warning of high voltage. This screen or guard shall be so located that it will be impossible for anyone working around the generator to accidently come in contact with the high tension circuits.

(c) When adjusting safety valves, the power circuit to the generator shall be open. The generator may be under steam pressure but the power line shall be open while the operator is making the necessary adjustments.

(d) The minimum safety valve or safety relief valve relieving capacity for electric boilers shall be three and one half lbs. per hour per kilowatt input.

(Effective August 25, 1987)