Speaker Wiring; Wiring Lengths; Class B Speaker Configuration For Ecs-Dual50W - Honeywell ECS Series Installation And Operation Manual

ECS Device Installation
4.8.5

Speaker Wiring

Each ECS-DUAL50W supplies eight NAC (Notification Appliance Circuit) for speaker connection. The
speaker circuit can be supervised and wired Class B or Class A. The speaker circuits are capable of
50 watts (each) at 25 Vrms or 70.7 Vrms.

4.8.5.1 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.

4.8.5.2 Class B Speaker Configuration for ECS-Dual50W

Figure 4-61 illustrates how to wire speakers to the control panel using Class B supervision.
Table 4-7: Wire Lengths for ECS-DUAL50W
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
Supervised
Power Limited
Figure 4-61 Class B Speaker Configuration
4-47
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
151455
12 AWG
15680
100520
8540
61100
5870
44200
4420
34175
3050
24520
2200
16480
1800
14070
15kΩ EOL