Honeywell HPF24S6 Installation Manual - Page 43

Appendix A: Wire Requirements Connecting external system accessories to the main circuits must be carefully considered to ensure proper operation. It is important to use the correct type of wire, gauge and run length for each circuit. The following table lists NAC wiring requirements for the HPF24S6 and HPF24S8 Field Charger Power Supply. NAC Load (Amps) Max. allowable total loop resistance (ohms) CLASS-B Max. allowable wire pair lenth (feet) AWG 12 AWG 14 AWG 16 AWG 18 solid solid solid solid CLASS-A Max. allowable wire pair length (feet) AWG 12 AWG 14 AWG 16 AWG 18 solid solid solid solid 0.25 6.00 1554 977 613 386 777 489 307 193 0.5 3.00 777 489 307 193 389 244 153 97 0.75 2.00 518 326 204 129 259 163 102 64 1.0 1.50 389 244 153 97 194 122 77 48 1.25 1.20 311 195 123 77 155 98 61 39 1.5 1.00 259 163 102 64 130 81 51 32 1.75 0.86 222 140 88 55 111 70 44 28 2.0 0.75 194 122 77 48 97 61 38 24 2.25 0.67 173 109 68 43 86 54 34 21 2.5 0.60 155 98 61 39 78 49 31 19 2.75 0.55 141 89 56 35 71 44 28 18 3.0 0.50 130 81 51 32 65 41 26 16 Table A.1 NAC Wiring Requirements for Power Supply NOTE: Calculations are based on Direct-Current Resistance data for uncoated copper wire, per National Electrical Code (2005 Edition) Table 8, Conductor Properties. NOTE: These distances reflect the worst case scenario and are based on the correct draw of the highest candela strobes at the low end of the supported NAC voltage with the entire load at the end of the circuit. Further distances can be achieved by performing a point to point voltage calculation that more accurately reflects the specific devices used and how they are dispersed on the circuit. HPF24S Series Power Supplies - P/N 52751:F2 7/11/2014 43