Acts and Regulations

91-191 - General

Section 168
Disposition versions

Full text
Electric initiation of blasting and distance from transmitter
168An employer and a blaster shall each ensure that electric initiation of blasting is not carried out at a distance from any transmitter less than the minimum distances established by the Institute of Makers of Explosives in its publication entitled “Safety Guide for the Prevention of Radio Frequency Radiation Hazards in the Use of Commercial Electric Detonators (Blasting Caps)” (December 2011), as amended.
93-8; 97-121; 2024-38
Electric initiation of blasting and distance from transmitter
168An employer and a blaster shall each ensure that electric initiation of blasting is not carried out at a distance from any transmitter less than the minimum distances shown in the following tables:
MINIMUM DISTANCES FROM COMMERCIAL
AM BROADCAST TRANSMITTERS
(0.535 to 1.705 MHz)
TRANSMITTER
POWER (1)
(Watts)
MINIMUM
DISTANCE
(Metres)
Up to 4,000
245
  4,001 - 5,000  
275
  5,001 - 10,000
395
10,001 - 25,000
610
25,001 - 50,000
885
  50,001 - 100,000
1,250
(1)Power delivered to antenna.
MINIMUM DISTANCES FROM TRANSMITTERS
UP TO 50 MHz
(excluding Commercial AM Broadcast
Transmitters)
 
CALCULATED FOR A SPECIFIC LOOP
PICKUP CONFIGURATION
TRANSMITTER
POWER (1)
(Watts)
MINIMUM
DISTANCE
(Metres)
Up to 100
245
     101 - 500       
520
     501 - 1,000    
760
  1,001 - 5,000    
5,185
  5,001 - 50,000  
1,680
50,001 - 500,000
16,770
(1)Power delivered to antenna.
MINIMUM DISTANCES FROM MOBILE TRANSMITTERS
INCLUDING AMATEUR AND CITIZEN’S BAND
TRANSMISSION FREQUENCY IN MHz
TRANSMITTER
POWER
(Watts)
MF
1.6-3.4
(Metres)
HF
28-29.7
(Metres)
VHF
35-36
42-44
50-54
(Metres)
VHF
144-148
150.8-161.6
(Metres)
UHF
450-470
(Metres)
        0 - 5        
  10
  20
  20
  6
  3
        6 - 10      
  15
  30
  25
  9
  6
      11 - 30      
  20
  55
  45
  16
  10
      31 - 50      
  25
  70
  55
  21
  12
      51 - 60      
  30
  75
  60
  23
  13
      61 - 100    
  35
100
  80
  30
  18
    101 - 180    
  50
130
110
  40
  25
    181 - 250    
  60
150
125
  50
  30
    251 - 350    
  70
180
150
  60
  35
    351 - 500    
  85
220
180
  70
  40
    501 - 600    
  90
240
195
  75
  45
    601 - 1000  
125
310
250
  95
  55
1001 - 1500  
135
345
280
110
  65
1501 - 10000
380
975
795
305
175
 
 
MINIMUM DISTANCES FROM CITIZEN’S
BAND CLASS D TRANSMITTERS
(26.96 - 27.41 MHz)
TYPE
MINIMUM
DISTANCE
(Metres)
 
Double Sideband (hand-held)
(4 watts max.)
1.5
 
Double Sideband (vehicle-mounted)
(4 watts max.)
20.0
 
Side Sideband (hand-held)
(12 watts peak)
6.0
 
Side Sideband (vehicle-mounted)
(12 watts peak)
34.0
 
MINIMUM DISTANCES FROM VHF TV
AND FM BROADCASTING
TRANSMITTERS
EFFECTIVE
RADIATED
POWER
(Watts)
CHANNELS 2 to 6 (Metres)
CHANNELS 7 to 13 (Metres)
FM RADIO (Metres)
Up to 1,000
305
185
245
 1,001 - 10,000
550
305
430
 10,001 - 100,000
980
580
795
100,001 - 325,000
1,315
765
1,040
325,001 - 1,000,000
1,770
915
1,405
 
MINIMUM DISTANCES FROM
UHF TV TRANSMITTERS
EFFECTIVE RADIATED
POWER
(Watts)
MINIMUM
DISTANCE
(Metres)
Up to 10,000
185
   10,001 - 1,000,000
610
1,000,001 - 5,000,000 
915
  5,000,001 - 100,000,000
1,830
 
MINIMUM DISTANCES FROM MARITIME
RADIONAVIGATIONAL RADAR
TYPE OF VESSEL
EFFECTIVE
RADIATED
POWER
(Watts)
MINIMUM
DISTANCE
(Metres)
Small Pleasure Craft
Up to 500 (1)
10
 
Harbour/River Craft
     501 - 5,000 (1)
15
 
Large Commercial Ships
     5,001 - 50,000 (2)
95
(1)3 cm (9000 MHz) frequency
(2)3 cm (9000 MHz) frequency10 cm (3000 MHz) frequency
NOTE: Department of National Defence and Coast Guard operate at a much higher frequency (200,000,000 watts)
93-8; 97-121
Electric initiation of blasting and distance from transmitter
168An employer and a blaster shall each ensure that electric initiation of blasting is not carried out at a distance from any transmitter less than the minimum distances shown in the following tables:
MINIMUM DISTANCES FROM COMMERCIAL
AM BROADCAST TRANSMITTERS
(0.535 to 1.705 MHz)
TRANSMITTER
POWER (1)
(Watts)
MINIMUM
DISTANCE
(Metres)
Up to 4,000
245
  4,001 - 5,000  
275
  5,001 - 10,000
395
10,001 - 25,000
610
25,001 - 50,000
885
  50,001 - 100,000
1,250
(1)Power delivered to antenna.
MINIMUM DISTANCES FROM TRANSMITTERS
UP TO 50 MHz
(excluding Commercial AM Broadcast
Transmitters)
 
CALCULATED FOR A SPECIFIC LOOP
PICKUP CONFIGURATION
TRANSMITTER
POWER (1)
(Watts)
MINIMUM
DISTANCE
(Metres)
Up to 100
245
     101 - 500       
520
     501 - 1,000    
760
  1,001 - 5,000    
5,185
  5,001 - 50,000  
1,680
50,001 - 500,000
16,770
(1)Power delivered to antenna.
MINIMUM DISTANCES FROM MOBILE TRANSMITTERS
INCLUDING AMATEUR AND CITIZEN’S BAND
TRANSMISSION FREQUENCY IN MHz
TRANSMITTER
POWER
(Watts)
MF
1.6-3.4
(Metres)
HF
28-29.7
(Metres)
VHF
35-36
42-44
50-54
(Metres)
VHF
144-148
150.8-161.6
(Metres)
UHF
450-470
(Metres)
        0 - 5        
  10
  20
  20
  6
  3
        6 - 10      
  15
  30
  25
  9
  6
      11 - 30      
  20
  55
  45
  16
  10
      31 - 50      
  25
  70
  55
  21
  12
      51 - 60      
  30
  75
  60
  23
  13
      61 - 100    
  35
100
  80
  30
  18
    101 - 180    
  50
130
110
  40
  25
    181 - 250    
  60
150
125
  50
  30
    251 - 350    
  70
180
150
  60
  35
    351 - 500    
  85
220
180
  70
  40
    501 - 600    
  90
240
195
  75
  45
    601 - 1000  
125
310
250
  95
  55
1001 - 1500  
135
345
280
110
  65
1501 - 10000
380
975
795
305
175
 
 
MINIMUM DISTANCES FROM CITIZEN’S
BAND CLASS D TRANSMITTERS
(26.96 - 27.41 MHz)
TYPE
MINIMUM
DISTANCE
(Metres)
 
Double Sideband (hand-held)
(4 watts max.)
1.5
 
Double Sideband (vehicle-mounted)
(4 watts max.)
20.0
 
Side Sideband (hand-held)
(12 watts peak)
6.0
 
Side Sideband (vehicle-mounted)
(12 watts peak)
34.0
 
MINIMUM DISTANCES FROM VHF TV
AND FM BROADCASTING
TRANSMITTERS
EFFECTIVE
RADIATED
POWER
(Watts)
CHANNELS 2 to 6 (Metres)
CHANNELS 7 to 13 (Metres)
FM RADIO (Metres)
Up to 1,000
305
185
245
 1,001 - 10,000
550
305
430
 10,001 - 100,000
980
580
795
100,001 - 325,000
1,315
765
1,040
325,001 - 1,000,000
1,770
915
1,405
 
MINIMUM DISTANCES FROM
UHF TV TRANSMITTERS
EFFECTIVE RADIATED
POWER
(Watts)
MINIMUM
DISTANCE
(Metres)
Up to 10,000
185
   10,001 - 1,000,000
610
1,000,001 - 5,000,000 
915
  5,000,001 - 100,000,000
1,830
 
MINIMUM DISTANCES FROM MARITIME
RADIONAVIGATIONAL RADAR
TYPE OF VESSEL
EFFECTIVE
RADIATED
POWER
(Watts)
MINIMUM
DISTANCE
(Metres)
Small Pleasure Craft
Up to 500 (1)
10
 
Harbour/River Craft
     501 - 5,000 (1)
15
 
Large Commercial Ships
     5,001 - 50,000 (2)
95
(1)3 cm (9000 MHz) frequency
(2)3 cm (9000 MHz) frequency10 cm (3000 MHz) frequency
NOTE: Department of National Defence and Coast Guard operate at a much higher frequency (200,000,000 watts)
93-8; 97-121