EP 1110-1-17
16 Jul 99
TABLE 3-3
Minimum Safe Distances Between RF Transmitters and Electric Blasting Operations1
Minimum Safe Distance in Meters (Feet)
Transmitter Power
Commercial AM Broadcast
HF Transmitters Other
(watts)
Transmitters
Than AM Broadcast
100
228.6
(750)
228.6
(750)
500
228.6
(750)
518.2
(1,700)
1,000
228.6
(750)
731.5
(2,400)
4,000
228.6
(750)
1,463.0
(4,800)
5,000
259.1
(850)
1,676.4
(5,500)
10,000
396.2
(1,300)
2,316.5
(7,600)
25,000
609.6
(2,000)
3,657.6
(12,000)
2
50,000
853.4
(2,800)
5,181.6
(17,000)
100,000
1,188.7
(3,900)
7,315.2
(24,000)
3
500,000
2,682.2
(8,800)
16,764.0
(55,000)
1
From TM 9-1300-214.
2
Present maximum power of US broadcast transmitters in Commercial AM Broadcast
Frequency Range (0.535 to 1.605 MHz).
3
Present maximum for international broadcast.
TABLE 3-4
Minimum Safe Distances Between TV and FM Broadcasting
Transmitters And Electric Blasting Operations1
Minimum Safe Distances in Meters (Feet)
Effective
Radiative Power
Channels 2 to 6 and FM
Channels 7 to 13
UHF
(watts)
Up to 1,000
304.8
(1,000)
228.6
(750)
182.9
(600)
10,000
548.6
(1,800)
396.2
(1,300)
182.9
(600)
100,0002
975.4
(3,200)
701.0
(2,300)
335.3
(1,100)
316,0003
1,310.6
(4,300)
914.4
(3,000)
442.0
(1,450)
1,000,000
1,767.8
(5,800)
1,219.2
(4,000)
610.0
(2,000)
5,000,0004
2,743.2
(9,000)
1,889.8
(6,200)
914.4
(3,000)
10,000,000
3,109.0
(10,200)
2,255.5
(7,400)
1,066.8
(3,500)
100,000,000
1,828.8
(6,000)
1
From TM 9-1300-214.
2
Present maximum power, channels 2 to 6 and FM.
3
Present maximum power, channels 7 to 13.
4
Present maximum power, channels 14 to 83.
3-9
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