Speaker Wiring; Wiring Lengths; Class B - Honeywell ECS Series Installation And Operation Manual

ECS Device Installation
4.7.5

Speaker Wiring

Each ECS-125W supplies four NAC (Notification Appliance Circuit) for speaker connection. The
speaker circuit can be supervised and wired Class B or Class A. 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.

4.7.5.1 Wiring Lengths

Number Of Speakers
@1/2 W @1 W
10 5
20 10
30 15
40 20
52 26
80 40
100 50
150 75
200 100
250 125
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.

4.7.5.2 Class B

Figure 4-46 illustrates how to wire speakers to the control panel using Class B supervision.
Table 4-5 Wire Lengths
Total Load
Vrms Watts 18 AWG
25Vrms 5W 3900
25Vrms 10W 2125
25Vrms 15W 1460
25Vrms 20W 1100
25Vrms 26W 760
25Vrms 40W 550
25Vrms 50W 450
25Vrms 75W 300
25Vrms 100W 225
25Vrms 125W 180
Supervised
Power Limited
Figure 4-46 Class B Speaker Configuration
4-35
Wire Distance in Feet
16 AWG 14 AWG
6200 9860
3380 5375
2320 3690
1750 2780
1200 1920
875 1390
715 1130
476 753
357 565
285 452
151455
12 AWG
15680
8540
5870
4420
3050
2200
1800
1200
900
720
15kΩ EOL