Mich. Admin. Code R. 400.18615 - Exit signs and illumination
Rule 615.
(1) Each
exit shall be marked by means of an electrically lighted exit sign that has
letters which are not less than 3 3/4 inches in height on a background of
contrasting color and which have strokes that are not less than 3/4 of an inch
in width and shall be installed so that the sign is legible from the direction
of travel toward the sign. If doorways and signs are not readily discernible
from a resident's room doorway, an adequate number of additional electrically
lighted directional signs shall be provided and shall have an arrow pointing in
the direction of the exits.
(2)
Adequate equipment shall be provided in all facilities for the lighting, at all
times, of corridors, stairways, outside fire escapes, and egress
passages.
(3) In new construction,
the lighting required by this rule shall be installed on separate circuits
which are in nonflexible metallic conduit and which are fused ahead of the main
entrance switch and cutout.
(4) In
new construction, other wiring shall not be in the same raceway or conduit that
serves the exit lights and emergency lighting.
Notes
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