EP 1110-1-17
16 Jul 99
TABLE 3-5
Minimum Safe Distances Between Mobile RF Transmitters
and Electric Blasting Operations1
Minimum Safe Distance in Meters (Feet)
VHF
UHF
MF
HF
VHF
144 - 148 MHz Amateur,
450 - 460 MHz
Power Watts
1.6 - 3.4 MHz Industrial
28-29.7 MHz
35 - 36 MHz Pub. Use
Public Use
150.8 - 161.5 MHz
Amateur
42 - 44 MHz Pub. Use
Public Use
50 - 54 MHz Amateur
2
5
10
12.2
(40)
30.5
(100)
12.2
(40)
4.6
(15)
3.0
(10)
50
27.4
(90)
67.0
(220)
27.4
(90)
10.7
(35)
6.1
(20)
100
38.1
(125)
94.5
(310)
39.6
(130)
15.2
(50)
9.1
(30)
1803
19.8
(65)
12.2
(40)
250
61.0
(200)
149.4
(490)
62.5
(205)
22.9
(75)
13.7
(45)
5004
88.4
(290)
6005
91.4
(300)
231.6
(760)
96.0
(315)
35.0
(115)
21.3
(70)
1,0006
122.0
(400)
298.7
(980)
125.0
(410)
45.7
(150)
27.4
(90)
10,0007
381.0
(1,250)
396.2
(1,3000)
1
From TM 9-1300-214.
2
Citizens band radio (walkie-talkie) (26.96 to 27.23 MHz) - Minimum safe distance - five feet.
3
Maximum power for 2-way mobile units in VHF (150.8 to 161.6 MHz range) and for 2-way mobile and fixed station units in UHF (450 to
460 MHz range).
4
Maximum power for major VHF 2-way mobile and fixed station units in 35 to 44 MHz range.
5
Maximum power for 2-way fixed station units in VHF (150.8 to 161.6 MHz range).
6
Maximum power for amateur radio mobile units.
7
Maximum power for some base stations in 42 to 44 MHz band and 1.6 to 1.8 MHz band.
3-10
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