Section 7.113. Control apparatus

Latest version.

(a) Operating switches shall be provided in a suitable location on the platforms of orchestra and organ console elevators. Emergency stop switches shall be provided and placed adjacent to the operating switches in as convenient a location as possible. A manually-operated double-pole disconnecting service switch shall be installed in the main line to cut off power from the operating machinery. When alternating current is used, reverse phase relays shall be provided.
(b) Lumber elevators shall be operated by switches or buttons located at a point where the entire shaftway is visible. Buttons shall be of the constant pressure type. Hand switches shall be of the self-centering type.

                    
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