4: Speaker Wiring; Wiring Lengths; Class B (Style Y) - Honeywell Fire-Lite Alarms ECC-50DA Installation Manual

Installation
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

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.

Class B (Style Y)

Figure 2.4 illustrates how to wire speakers to the control panel using Class B (Style Y) supervision.
ECC-50/125DA Instruction Manual — P/N LS10027-000FL-E:D 5/21/2015
Total Load
Vrms Watts 18 AWG
25Vrms 5W
25Vrms 10W
25Vrms 15W
25Vrms 20W
25Vrms 26W
25Vrms 40W
25Vrms 50W
25Vrms 75W
25Vrms 100W
25Vrms 125W
Table 2.1 Wire Lengths
CIRCUIT 4 CIRCUIT 3 CIRCUIT 2
+ IN – + OUT – + IN – + OUT – + IN
Supervised,
Power-limited
Figure 2.4 Class B (Style Y) Speaker Configuration
firealarmresources.com
Wire Distance in Feet
16 AWG 14 AWG
3900 6200
2125 3380
1460 2320
1100 1750
760 1200
550 875
450 715
300 476
225 357
180 285
CIRCUIT 1 BATTERY
+ –
– + OUT – + IN – + OUT –
ECC-125DA Remote Amplifier
12 AWG
9860 15680
5375 8540
3690 5870
2780 4420
1920 3050
1390 2200
1130 1800
753 1200
565 900
452 720
UL-Listed
15K Ω ELR
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