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Page Title:
Table 10-2. Uncontrolled Environment Exposure Limits |
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|  DOE-HDBK-1092-98
Table 10-2. Uncontrolled Environment Exposure Limits
Part A
Electromagnetic Fieldsa
1
2
3
4
5
Frequency
Power density (S)
Averaging
range
strength (E)
strength (H)
E-field, H-field
time
2,
|H|2
(mW/cm2)
(MHz)
(v/m)
(A/m)
|E|
S
(minutes)
(100, 1,000,000)b
0.003-0.1
61.4
163
6 6
16.3/ƒc
(100, 10,000/ƒ2)b
0.1-1.34
61.4
6 6
(180/ƒ2, 10,000/ƒ2)b
ƒ2/0.3
1.34-3.0
823.8/ƒ
16.3/ƒ
6
(180/ƒ2, 10,000/ƒ2)b
3.0-30
823.8/ƒ
16.3/ƒ
30
6
158.3/ƒ1.668 (0.2,940,000/ƒ6.336)b
1.337
30-100
27.5
30
0.0636ƒ
100-3,00
27.5
0.0729
0.2
30
30
300-3,000
ƒ/1,500
30
3,000-15,000
ƒ/1,500
90,000/ƒ
1.2
15,000-300,000
10
616,000/ƒ
Part B
Introduced and contact RF Currentsd
Frequency range
Maximum current (mA)
Contact
Through both feet
Through each foot
0.003-0.1 MHz
900 ƒ
450 ƒ
450 ƒ
0.1-100 MHz
90
45
45
a.
The exposure values in terms of electric and magnetic field strength are the values obtained by spatially
averaging values over an area equivalent to the vertical cross section of the human body (projected area).
b.
These plane-wave equivalent power density values, although not appropriate for near-field conditions,
are commonly used as a convenient comparison with MPEs at higher frequencies and are displayed on
some instruments in use.
The f = frequency in MHz.
c.
d.
It should be noted that the current limits given in this table may not adequately protect against startle
reactions and burns caused by transient discharges when contacting an energized object.
10.9.1.2
DESIGN AND CONSTRUCTION
10.9.1.2.1 DESIGN AND CONSTRUCTION AS AN INTEGRAL PART OF
EQUIPMENT
If the AHJ determines that wiring is an integral part of an apparatus (e.g., instrumentation
interconnections), then the wiring methods used should be evaluated by the AHJ as providing safe
operating conditions. This evaluation may be based on a combination of standards and engineering
documentation where appropriate. Such an evaluation should consist of an analysis of all stresses
imposed on any electrical conductive elements, including, but not limited to electrical, magnetic,
heating, and physical damage potential. The wiring methods selected must mitigate to the greatest
practical extent any undesired effects of a failure sequence.
10-12
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