Product Selection Guide Page 685 Product Selection Guide-11th Edition

PRODUCT INFORMATION 685 PSG11 GENERAL INFORMATION Performance Data www.lithonia.com VOLTAGE DROP TABLES The following information is provided to assist in planning layouts for emergency lighting systems. The National Electrical Code limits voltage drop to a maximum of 5% of nominal. Thus, circuit runs must be of sufficient size to maintain operating voltage when remote fixtures and/ or exit signs are connected to the emergency lighting equipment. The table below shows the length of wire run based on system voltage, wire gauge and total wattage on the run. Formula: As per NEC standards, V D = 2 x L x I x R 1000 Where: L = length of run in feet I = current R = resistance of material at 75C V D = voltage drop Example 1: A 12V system using a 10-gauge wire will operate four 12W lamps. Total watts on the wire run is 48, length of run from table is 70 feet. Longer Wire Runs If loads are uniformly spaced along circuit path (equal watts, equal distances), lengths in the table can be increased by certain values. Example 2: Remote heads from Example 1 will be uniformly spaced. Multiplier is 1.6 for four fixtures. Maximum permissible length of wire run is 70' x 1.6, or 112'. To determine multiplier for six or more fixtures, use the following formula: Number of fixtures = n Multiplier = 2n n+1 6V SYSTEM TOTAL WATTS WIRE SIZE LENGTH OF WIRE RUN (FEET) 12 10 8 6 4 8 67 106 169 268 350 10 53 85 135 214 280 12 44 70 112 178 234 13 41 65 110 165 216 14 38 60 96 153 200 16 33 53 84 134 175 18 30 47 75 120 156 20 26 42 67 107 140 21 25 40 64 102 134 24 22 35 56 89 117 25 21 32 54 86 112 30 18 28 45 71 93 35 15 24 39 62 80 36 15 24 38 61 97 40 13 21 33 53 70 48 11 17 28 44 58 50 10 17 27 43 56 54 10 16 26 41 65 60 9 14 22 36 47 75 8 11 18 29 37 100 6 9 14 22 28 125 4 6 10 17 22 150 3 5 9 14 19 175 3 4 7 12 16 200 2 4 6 10 14 225 2 3 6 9 12 250 2 3 5 8 11 300 1 2 4 7 9 400 1 2 3 5 7 450 1 1 3 4 7 12V SYSTEM TOTAL WATTS WIRE SIZE LENGTH OF WIRE RUN (FEET) 12 10 8 6 4 8 267 425 675 1,073 1,707 10 213 339 540 858 1.366 12 178 283 450 715 1,138 13 165 260 415 660 1,050 14 152 242 385 613 975 16 133 212 337 536 853 18 110 190 300 475 760 20 106 169 270 429 683 21 101 161 257 408 650 24 89 141 225 357 569 25 85 136 215 340 540 30 71 112 180 285 455 35 61 97 154 245 390 36 61 97 154 244 388 40 53 84 135 214 341 48 44 70 112 178 284 50 42 68 108 170 275 54 40 64 102 163 259 60 35 52 90 140 225 75 29 45 72 114 182 100 21 34 54 86 137 125 17 27 43 68 109 150 14 23 36 57 91 175 12 19 30 49 78 200 10 17 27 43 68 225 9 15 24 38 60 250 8 14 21 34 55 300 7 11 18 28 45 400 5 8 13 21 34 450 4 8 12 19 30 24V SYSTEM TOTAL WATTS WIRE SIZE LENGTH OF WIRE RUN (FEET) 12 10 8 6 4 8 1,068 1,698 2,701 4,293 6,830 10 854 1,358 2,161 3,435 5,464 12 712 1,132 1,801 2,862 4,553 13 660 1,040 1,668 2,640 4,200 14 610 970 1,543 2,453 3,902 16 534 849 1,350 2,146 3,415 18 440 760 1,200 1,900 3,040 20 427 679 1,080 1,717 2,732 21 407 647 1,029 1,635 2,601 24 356 566 900 1,431 2,276 25 340 544 860 1,360 2,160 30 284 448 720 1,140 1,810 35 244 388 616 980 1,560 36 242 386 614 976 1553 40 213 339 540 858 1,366 48 178 283 450 715 1,138 50 168 272 432 680 1,100 54 162 257 410 651 1,035 60 140 208 360 560 900 75 116 180 288 456 728 100 84 136 216 344 548 125 68 108 172 274 437 150 56 92 144 228 364 175 48 77 123 196 312 200 40 68 108 172 272 225 37 60 96 152 242 250 32 52 84 136 220 300 26 44 72 112 180 400 21 34 54 85 136 450 19 30 48 76 120 Number of fixtures: 2 3 4 5 Multiplier: 1.33 1.5 1.6 1.67 LITHONIA LIGHTING EMERGENCY SYSTEMS

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