Voltage Detection Warning Distances
LOW VOLTAGE First Alert / Max Alert
| LEDS | 400V | 600V | 1.2kV |
| 1 | 6ft / 1ft | 6ft / 2ft | 9ft / 4ft |
| 2 | 7.5ft / 3ft | 8ft / 4ft | 11ft / 6ft |
| 3 | 10ft / 5f | 10ft / 6ft | 14ft / 8ft |
| 4 | 12ft / 6ft | 13ft / 8ft | 17ft / 11ft |
| 5 | 13.5ft / 7.5ft | 16ft / 10ft | 20ft / 13ft |
| 6 | 16ft / 10ft | 17ft / 11ft | 23ft / 15ft |
| 7 | 17ft / 11ft | 19ft / 12ft | 25ft / 17ft |
| 8 | 18ft / 12ft | 10ft / 13ft | 29ft / 19ft |
| 9 | 19ft / 13ft | 22ft / 14ft | 29ft / 20ft |
| 10 | 20ft / 14ft | 23ft / 15ft | 34ft / 22ft |
| 11 | 24ft / 15ft | 26ft / 16ft | 36ft / 23ft |
MEDIUM VOLTAGE First Alert / Max Alert
| LEDS | 2.4kV | 4.2kV | 7.2kV |
| 1 | 2ft / X | 3ft / X | 5ft / 1ft |
| 2 | 3ft / X | 4ft / 1ft | 6.5ft / 2.5ft |
| 3 | 4ft / 0.5ft | 6ft / 2ft | 8ft / 4ft |
| 4 | 5ft / 1ft | 7ft / 3ft | 9ft / 5ft |
| 5 | 6ft / 2ft | 8.5ft / 4.5ft | 11ft / 7ft |
| 6 | 8ft / 4ft | 10ft / 5.5ft | 13ft / 8ft |
| 7 | 10ft / 5ft | 12ft / 7ft | 14ft / 9ft |
| 8 | 11ft / 6ft | 14ft / 8ft | 17ft / 11ft |
| 9 | 13ft / 8ft | 16ft / 10ft | 19ft / 13ft |
| 10 | 15ft / 9ft | 19ft / 12f | 23ft / 15ft |
| 11 | 18ft / 11ft | 23ft / 14ft | 27ft / 17ft |
HIGH VOLTAGE First Alert / Max Alert
*High Voltage Chart data is still pending review. Please contact your regional Safeguard representative for more information
X = DO NOT USE! Alert distance is too short or non-existent. Distances were measured using a 4ft x 2in diameter busbar elevated 2.5 feet above the ground, in an outdoor setting (26°C and 35% RH) by a tester walking with a COMPASS Pro device mounted on a full-brim hard hat. Distances will vary depending on conditions; always verify exact distances for a given situation.