Table 7: Distance to FCC 1.8 SM

DISTANCE AT WHICH FCC TWA SAFETY LIMIT IS EXCEEDED (in inches)

(FCC limit is 655 uW/cm2 in smart meters)

One Smart Meter Table A1 Table A2 Table A3 Table A4
Duty Cycle 60% 100% 1000% 2000%
Reflection Reflection Reflection* Reflection*
1% 0.5” 0.6” 3.5” 6.68”
10% 1.6” 2.0” 11.1” 21.1”
20% 2.3” 2.8” 15.6” 29.9”
30% 2.8” 3.5” 19.2” 36.6”
40% 3.2” 4.0” 22.1” 42.2”
50% 3.6” 4.5” 24.7” 47.3”
60% 3.9” 4.9” 27.1” 51.7”
70% 4.3” 5.3” 29.3” 55.9”
80% 4.6” 5.7” 31.3” 59.8”
90% 4.8” 6.0” 33.2” 63.4”
100%*** 5.1” 6.4” 35.0” 66.8”

*Note: 1000-2000% reflection based on Vermeeren et al, 2010; Christ et al, 2010; Hondou, 2002.

**More than 4 meters placed together do not appreciably increase the exposure to one reference point, such as a crib or bed. However, multiple meters can increase the square footage of space similarly affected.

***Continuous exposure is required in calculations of time-weighted average radiofrequency exposure for uncontrolled public access by FCC OET 65 (p. 15).

Four Meters** Table A5 Table A6 Table A7 Table A8
Duty Cycle 60% 100% 1000% 2000%
Reflection Reflection Reflection* Reflection*
1% 1.44″ 1.8″ 9.4″ 18.7″
10% 3.42″ 4.8″ 31.2″ 59.7”
20% 5.70″ 7.47″ 44.2″ 84.0”
30% 7.29″ 9.39″ 54.1″ 103.4”
40% 8.6″ 11.0″ 62.5″ 119.5”
50% 9.73″ 12.4″ 70″ 133.6”
60% 10.7″ 13.6″ 76.6″ 146.3”
70% 11.7″ 14.8″ 82.2″ 158.0”
80% 12″ 15.8″ 88.4″ 169.0”
90% 13″ 16.8″ 93.8″ 179.3”
100%*** 14″ 17.7″ 98.9″ 188.9″