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Installation
3.2.5 Speaker Wiring
Each ECC-50BDA supplies eight NAC (Notification Appliance Circuit) for speaker connection.
The speaker circuit can be supervised and wired Class B (Style Y) or Class A (Style Z). The
speaker circuits are capable of 50 watts (each) at 25 Vrms or 70.7 Vrms.
Wiring Lengths
Number Of Speakers
@1/2 W
@1 W
10
5
20
10
30
15
40
20
52
26
80
40
100
50
NOTE: The above table assumes a uniform distribution of the speakers, and that a max of 20%
voltage drop on the last speaker is allowed.
Class B (Style Y)
Figure 3.5 illustrates how to wire speakers to the control panel using Class B (Style Y) supervision.
TB2
+
-
ECC-50/125DA Instruction Manual — P/N LS10027-000FL-E:D 5/21/2015
Total Load
Vrms
Watts
18 AWG
25Vrms
5W
3900
70Vrms
25000
25Vrms
10W
2125
70Vrms
15200
25Vrms
15W
1460
70Vrms
11000
25Vrms
20W
1100
70Vrms
8500
25Vrms
26W
760
70Vrms
6100
25Vrms
40W
550
70Vrms
4100
25Vrms
50W
450
70Vrms
3500
Table 3.1 Wire Lengths
TB5
TB6
OUT
IN
+
-
+
-
+
-
+
-
+
-
+
Supervised,
Power-limited
Figure 3.5 Class B (Style Y) Speaker Configuration
firealarmresources.com
ECC-50BDA Backup Remote Amplifier
Wire Distance in Feet
16 AWG
14 AWG
6200
9860
39700
63200
3380
5375
24150
38400
2320
3690
17500
27800
1750
2780
13510
21500
1200
1920
9700
15400
875
1390
6500
10360
715
1130
5560
8850
OUT
IN
TB4
-
+
-
+
-
B A +
12 AWG
15680
100520
8540
61100
5870
44200
4420
34175
3050
24520
2200
16480
1800
14070
-
15KΩ UL-
Listed ELR
31
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