28
US
Reduced clearances (CANADA ONLY)
Type of protection (shield)
Sheet metal, a minimum of 29 gauge in thickness spaced out at least 21 mm (7/8 in.)
by non-combustible spacers.
Ceramic tiles, or equivalent non-combustible material on non-combustible supports
spaced out at least 21 mm (7/8 in.) by non-combustible spacers.
Ceramic tiles, or equivalent non-combustible material on non-combustible supports
with a minimum of 29 gauge sheet metal backing spaced out at least 21 mm (7/8 in.)
by non-combustible spacers.
Brick spaced out at least 21 mm (7/8 in.) by non-combustible spacers.
Brick with a minimum of 29 gauge sheet metal backing spaced out at least 21 mm
(7/8 in.) by non-combustible spacers.
