Specifications

Mounting Options
(J) BB Backbox (Order Codes: Red 2830, Gray 2349)
Used with Series 31T, 43T, MB,
MT4, RSS
See Note 9
(K) WBB Weather Resistant Backbox (Order Codes: Red 2959, White 2411)
(L) ISP2 Surface Adapter (Order Code: Red 3194, White 3195)
(M) IOB Backbox (Order Codes: Red 5046, White 5047)
Maximum Number of Conductors
AWG.
#18
AWG.
#16
AWG.
#14
AWG.
#12
4 4 4 4
Maximum Number of Conductors
AWG.
#18
AWG.
#16
AWG.
#14
AWG.
#12
8 8 8 8
For surface mounting MT products
Maximum Number of Conductors
AWG.
#18
AWG.
#16
AWG.
#14
AWG.
#12
8 8 8 8
(Q) 4” Square Deep w/ Extension Ring, Flush (BO)
(P) SBB Backbox (Order Codes: Red 3204, White 3193)
(O) RP-R Retrofit Plate (Order Code: 5042)
(N) DBB Backbox (Order Code: 2955)
Maximum Number of Conductors
AWG.
#18
AWG.
#16
AWG.
#14
AWG.
#12
8 8 8 8
Used with Series 31T, 43T,
AMT, CH70, E70, ET70, ET-1010,
ET-1080, HS4, HS, MB, MT,
MT4, RSS
Used with Series 43T, AMT,
CH70, E70, ET70, ET-1080, HS4,
HS, MB, MT, RSS
See Note 11
Used with Series CH70, CH90,
E70, ET70, E90, ET90, ET-1080
See Note 6
Exterior Ring
Depth 1-1/2” 2-1/8”
AWG. #18 8 8
AWG. #16 8 8
AWG. #14 8 8
AWG. #12 4 8
Standard steel backbox with knockouts for interior surface mounting,
concealed conduit mounting or semi-flush applications. It is painted
to match the signal.
Provided with
knockouts for
1/2” & 3/4”
conduit
Maximum Number of Conductors
AWG.
#18
AWG.
#16
AWG.
#14
AWG.
#12
4 4 4 4
#8-32 Tap
Holes (2)
3-3/8”
3-3/8”
4”
5”
Sturdy die-cast housing, threaded conduit hole and knockout for
outdoor applications. It is painted to match the signal.
Used with Series 31T, 43T,
AHWP, ET-1010, MB, MT4
See Note 2
Tapped
for 1/2”
conduit
1/4” Dia.
Holes (2)
3-3/8”
3-3/8”
5”
4-1/8” Sq.
2-1/16”
1/2” Knockout
2”
1/4”
Used with Series AMT, CH70,
E70, ET70, HS4, HS, MT
Used with Series AMT,
ET70WP, HS4, HS, MT, MTWP
See Note 10
For surface mounting speakers, chimes, and electronic applications
2-1/8” Deep
1-1/2” Deep
Used with Series 31T, 43T,
AMT, ET-1010, HS4, HS, MB,
MT, MT4, RSS
Standard steel backbox provided with knockouts for interior surface
mounting, concealed conduit mounting or semi-flush applications.
It is painted to match the signal.
#8-32 Tap
Holes (2)
3-3/8”
3-3/8”
4” Sq.
2-3/16”
Provided with
knockouts for
1/2” & 3/4”
conduit
4 5/32
4-5/32” Sq.
5-1/4” Sq.
3-45/64”
29/32”
1-3/16”
Knockouts for 1/2” conduit
(top, bottom)
3-3/8” Sq.
5-1/4” Sq.
2-5/8”
5-21/32”
3-3/8” Sq.
5-7/8”
3-13/16” Sq.
8”
13/32”
3-3/8” Sq.
5-9/16”
5-1/2”
3/4” Knockouts
(each side)
1/2” Knockouts
(each side)
3-9/16”
2-5/8”
EATON Audible/Visual Appliances www.coopernotification.com
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