face or
room, the space within 900 mm (3 ft) in all directions
from any openings sha l be considered Class I, Division
2; or Class I, Zone 2; or Class II, Division 2 as shown in
Figure 516.3(C)(4). [33:6.5.4]
(5) Dip Tanks and Drain Boards — Surrounding Space. For dip tanks and drain boards, the 914-mm (3-ft) space surrounding the Class I, Division 1 or Class I, Zone 1
open front of the booth or room, as shown in Figure
location as defined in
516.3(A)(4) and as shown in
516.3(C)(2), top.
(b) If the exhaust ventilation
system is not
Figure 516.3(C)(5). [34:6.4.4]
interlocked with the spray application equipment, the Division 2 or Zone 2 location shall extend 3 m (10 ft) horizontally and 900 mm (3 ft) vertically from the open face or open front of the booth or room, as shown in Figure 516.3(C)(2), bottom.
Spray area\\\XV\\\
\V\yT>^V^^ mm
Top (plan)
(6) Dip Tanks and Drain Boards — Space Above Floor.
For dip tanks and drain boards, the space 900 mm (3 ft)
Roof
<.. image removed ..>
Front (elevation)
--------- 1 Class I, Division 1; Class I, Zone 1;
I or Class II, Division 1
\\V\IClass I, Division 2; Class I, Zone 2; \WX1 or Class II, Division 2
Figure 516.3(C)(1) Electrical Area Classification for Open
Spray Areas. [33:Figure 6.5.1]
For the purposes of this subsection, interlocked shall mean that the spray application equipment cannot be
^•1525 mm (5 ft) radius \ -
T 915 mm (3 ft) radius v "! \9 15mm
(3 ft) radius
915 mm (3 ft) radius
915 mm (3 ft) radius
900 mm R (3 ft)
Enclosed spray
booth or room
(Class I, Division
1 or
Extent of Class I or
\ Class II, Division 2 area
radius
915 mm (3 ft) radius
^C-\ Conveyor opening
1525 mm
(5 ft) radius
Class II, Division 1 within)
Pla
view
■3050 m (10 ft) radius 915 mm (3 ft) radius
c
915 mm (3 ft) radius
915 mm (3 ft) radius 900 mm R (3 ft)
900 mm R (3 ft) 900
mm R (3 ft)
k ' ' '—
; 915 mm j (3 ft)
radius
915 mm (3 ft) radius \
915 mm (3 ft) radius
Open face
Conveyor_„-- Jopening
3050 m (10 ft)
radius
Elevation
900 mm R (3 ft)
Figure 5163(C)(4) Class I, Division 2, Class I, Zone 2, or Class II, Division 2 Locations Adjacent to an Enclosed Spray Booth or Spray Room. [33:Figure 6.5.4]
Figure 516.3(C)(2) Class I, Division 2, Class I, Zone 2, or Class II, Division 2 Locations Adjacent to a Closed Top, Open Face, or Open Front Spray Booth or Room. [33:Figures 6.5.2(a) and
6.5.2(b)]
■1525mm
(5 ft)
1525 mm
(5 ft)
Point beyond which object is no longer a vapor source as defined in 516.3(B)(4)
915 mm
(3 ft)
lx*y*j Class I, Division 1 or Zone 0
I I Class I, Division 1 or Zone 1 k\VI Class I, Division 2 or Zone 2