Section 408.7100. Hoisting chains.

(1) Only roller chain made of high quality alloy, heat treated steel with the following characteristics is acceptable for hoisting chains:

(a)     Prestressed.

(b)     Shot peened.

(c)     In-line blanking.

(d)    Deep case hardening of pins and bushings.

(2)       Suspension means shall not be less than 2 separate roller chains, each chain having a tensile strength of not less than 3,500 pounds.

(3)     The factor of safety of the suspension means shall be not less than 7.

(4)     A chain shall have not less than 6 inches of chain available beyond the normal stopping point when the car has reached its extreme limits of travel.

(5)    A chain end shall be fastened by standard master links. R 408.7101  Wiring and lighting.

(1) Electric wiring shall be in rigid metal conduit or electrical metallic tubing.

(2)     A traveling cable used between the car and hoistway wiring shall be in compliance with the Michigan electrical code.

(3)      A fused disconnect main line switch externally operated shall be provided adjacent to the controller.

(4)     Hoistway lighting shall be provided.

History: 2003 AACS.