Part 1 : Sec. 1.1310 Radiofrequency radiation exposure limits


The criteria listed in table 1 shall be used to evaluate the environmental impact of human exposure to radiofrequency (RF) radiation as specified in Sec. 1.1307(b), except in the case of portable devices which shall be evaluated according to the provisions of Sec. 2.1093 of this chapter. Further information on evaluating compliance with these limits can be found in the FCC's OST/OET Bulletin Number 65, "Evaluating Compliance with FCC-Specified Guidelines for Human Exposure to Radiofrequency Radiation."

Note to Introductory Paragraph: These limits are generally based on recommended exposure guidelines published by the National Council on Radiation Protection and Measurements (NCRP) in "Biological Effects and Exposure Criteria for Radiofrequency Electromagnetic Fields," NCRP Report No. 86, Sections 17.4.1, 17.4.1.1, 17.4.2 and 17.4.3. Copyright NCRP, 1986, Bethesda, Maryland 20814. In the frequency range from 100 MHz to 1500 MHz, exposure limits for field strength and power density are also generally based on guidelines recommended by the American National Standards Institute (ANSI) in Section 4.1 of "IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz," ANSI/IEEE C95.1-1992, Copyright 1992 by the Institute of Electrical and Electronics Engineers, Inc., New York, New York 10017.

Table 1--Limits for Maximum Permissible Exposure (MPE)
Frequency range (MHz) Electric field strength (V/m) Magnetic field strength (A/m) Power density (mW/cm\2\) Averaging time (minutes)
(A) Limits for Occupational/Controlled Exposures (See Note 1)
0.3-3.0 614 1.63 *(100) 6
3.0-30 1842/f 4.89/f *(900/f2) 6
30-300 61.4 0.163 1.0 6
300-1500 --- --- f/300 6
1500-100,000 --- --- 5 6
(B) Limits for General Population/Uncontrolled Exposure (See Note 2)
0.3-1.34 614 1.63 *(100) 30
1.34-30 824/f 2.19/f *(180/f2) 30
30-300 27.5 0.073 0.2 30
300-1500 --- --- f/1500 30
1500-100,000 --- --- 1.0 30
f = frequency in MHz
* = Plane-wave equivalent power density

[61 FR 41016, Aug. 7, 1996]