ECC-50/125DA Instruction Manual —
P/N LS10027-000FL-E:D 5/21/2015
19
Installation
ECC-125DA Remote Amplifier
2.1.4 Speaker Wiring
Each ECC-125DA supplies four NAC (Notification Appliance Circuit) for speaker connection. The
speaker circuit can be supervised and wired Class B (Style Y) or Class A (Style Z). Speaker circuit
1 is capable of 100 watts of power at 25 Vrms. Speaker circuit 2-4 are capable of 50 watts (each) at
25 Vrms.
Wiring Lengths
Class B (Style Y)
Figure 2.4 illustrates how to wire speakers to the control panel using Class B (Style Y) supervision.
Number Of Speakers
Total Load
Wire Distance in Feet
@1/2 W
@1 W
Vrms
Watts
18 AWG
16 AWG
14 AWG
12 AWG
10
5
25Vrms
5W
3900
6200
9860
15680
20
10
25Vrms
10W
2125
3380
5375
8540
30
15
25Vrms
15W
1460
2320
3690
5870
40
20
25Vrms
20W
1100
1750
2780
4420
52
26
25Vrms
26W
760
1200
1920
3050
80
40
25Vrms
40W
550
875
1390
2200
100
50
25Vrms
50W
450
715
1130
1800
150
75
25Vrms
75W
300
476
753
1200
200
100
25Vrms
100W
225
357
565
900
250
125
25Vrms
125W
180
285
452
720
Table 2.1 Wire Lengths
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.
BATTERY
+
–
CIRCUIT 4
CIRCUIT 3
CIRCUIT 2
CIRCUIT 1
IN
IN
IN
IN
+
+
+
+
–
–
–
–
OUT
OUT
OUT
OUT
+
+
+
+
–
–
–
–
AU
DI
O E
X
P
AN
D
ER
UL-Listed
15K
Ω
ELR
Figure 2.4 Class B (Style Y) Speaker Configuration
Supervised,
Power-limited
125d
a_
b.w
m
f
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