Specifications

Backbox Mounting Heights for Wheelock Wall-Mounted Horizontal Strobe Appliances
NFPA-72 (2002)
7.5.4* Appliance Location. Wall-mounted appliances shall be mounted such that the entire lens is not less than 2.0 m (80 in.) and not greater
than 2.4 m (96 in.) above the finished floor.
* Measured from bottom of backbox (inches)
ote:N (BO) = By Others; (WSI) = Wheelock Product
Mounting Options
Mounting Notes
!
Caution: The mounting options figures show the maximum number of field wires (conductors) that can enter the backbox used with each mounting option. If these limits are exceeded, there
may be insufficient space in the backbox to accommodate the field wires and stresses from the wires could damage the product. Although the limits shown for each mounting option comply with
the National Electrical code (NEC), Wheelock recommends use of the largest backbox option and the use of approved stranded field wires whenever possible, to provide additional wiring room for
easy installation and minimum stress on the product from wiring.
!
Caution: Check that the installed product will have sufficient clearance and wiring room prior to installing backboxes and conduit, especially if sheathed multiconductor cable or 3/4” conduit
fittings are used.
1. Mounting hardware for each mounting option is supplied.
2. Conduit entrances to the backbox should be selected to provide sufficient wiring clearance for the installed product. When extension rings are required, conduit should enter through the
backbox, not the extension ring. Use Steel City #53151 (1-1/2” deep) or #53171 (2-1/8” deep) extension rings (as noted in the mounting options) or equal with the same cut-out area.
3. When terminating field wires, do not use more lead length than required. Excess lead length could result in insufficient wiring space for the appliance.
4. Use care and proper techniques to position the field wires in the backbox so that they use minimum space and produce minimum stress on the product. This is especially important for stiff,
heavy gauge wires and wires with thick insulation or sheathing.
5. Do not pass additional wires (used for other than the appliance) through the backbox “unless the backbox is of a sufficient size to permit additional wiring as described in NEC 314.16 (B)”.
Such additional wires could result in insufficient wiring space for the appliance.
ote:N Due to continuous development of our products, specifications and offerings are subject to change without notice in accordance with Wheelock Inc.
standard terms and conditions.
RSSP
Flush
Surface
Retrofit
Exceder ST,
HS, HN RSS Strobe
MT and AMT
Multitone
Strobe
Exceder LED -
LST, LHS, LHN
Exceder LED
Speakers -
LSPK, LSPST
Backbox Mounting Options* 80 In. 80 In. 6 In. 80 In. 6 In. 80 In. 6 In. 80 In. 6 In. 80 In. 6 In.
(B) 1-Gang x 2” Deep - Flush (BO) 80
3
/
4
5
1
/
4
79
1
/
8
6
7
/
8
79 7
(D) 4” x 4” x 1.5” Deep - Flush (BO) 83
15
/
16
80
1
/
4
5
3
/
4
78
5
/
8
7
3
/
8
77
1
/
8
8
1
/
8
80
1
/
4
5
3
/
4
(E) 4” x 4” x 2.125” Deep - Flush (BO) 83
15
/
16
80
1
/
4
5
3
/
4
78
5
/
8
7
3
/
8
77
7
/
8
8
1
/
8
80
1
/
4
5
3
/
4
(F) 2-Gang x 3.5” Deep - Flush (BO) 80
3
/
4
5
3
/
4
79
1
/
8
6
7
/
8
78
3
/
8
7
5
/
8
(G) 2-Gang x 1.75” Deep - Surface (BO) 79
7
/
8
6
1
/
8
78
1
/
4
7
3
/
4
77
1
/
2
8
1
/
2
(M) IOB Surface & Weatherproof (WSI) 77
1
/
4
8
3
/
4
(P) SBB Surface (WSI) 77
1
/
8
8
7
/
8
(Q) 4” x 4” x 2.125” Box w/ 1.5” Extension Ring - Flush (BO) 83
15
/
16
80
1
/
4
5
3
/
4
78
5
/
8
7
3
/
8
77
7
/
8
8
1
/
8
78
1
/
8
7
1
/
2
(U) 5” Square Backbox w/ Extension Ring, Flush (BO) 83
7
/
16
78
1
/
8
7
7
/
8
77
3
/
8
8
5
/
8
(X) SHBB (WSI) Shallow Surface 78
1
/
8
7
7
/
8
(Y) 4” x 4” x 1.5” Box w/ 1.5” Extension Ring Plate (BO)
(Z) SBL-2 Surface (WSI) 80
1
/
2
(II) ESB Backbox 5.375” x 4.75” x 2.0625” 79
9
/
16
6
7
/
16
(LL) LSBB Backbox 4.53” x 2.76” x 1.98” 78
3
/
4
7
1
/
4
(NN) LSPKBB Backbox 6.23” x 4.69” x 2.08” 78
1
/
2
7
1
/
2
Series CH70
Chime Strobe
Series ET80
Speaker Strobe
Series E70
Speaker Strobe
Series ET70
Speaker Strobe
Series SA-70S
Self Amplified
Speaker Strobe
Backbox Mounting Options* 80 In. 6 In. 80 In. 6 In. 80 In. 6 In. 80 In. 6 In. 80 In. 6 In.
(P) SBB Surface (WSI) 77 ¾ 8 ¼ 79
3
/
16
6
13
/
16
77 ¾ 8 ¼ 77 ¾ 8 ¼ 79
3
/
16
6
13
/
16
(Q) 4” x 4” x 2.125” Box w/ 1.5” Extension Ring - Flush (BO) 77 ½ 7 ½ 80 6 78 ½ 7 ½ 78 ½ 7 ½ 80 6
(U) 5” Square Backbox w/ Extension Ring - Flush (BO) 78 7 79 ½ 5 ½ 78 7 78 7 79 ½ 5 ½
(X) SHBB (WSI) Shallow Surface
(Y) 4” x 4” x 1.5” Box w/ 1.5” Extension Ring Plate - Flush (BO) 78 ½ 7 ½ 80 6
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