View source for List of external influences

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{{FigureRef|E65}} below is from '''IEC 60364-5-51''', which should be referred to if further details are required. 

{{tb-start|id=Tab1132|num=E65|title=List of external influences (taken from Appendix A of IEC 60364-5-51)|cols=5}}
{| class="wikitable"
|-
! Code 
! colspan="6" | External influences 
! Characteristics required for equipment
|-
! colspan="8" | A - Environment
|-
| {{tb-HC1}}|'''AA''' 
| {{tb-HC1}} colspan="7" | '''Ambient temperature (°C)'''
|-
|
| Low
| High
| colspan="5"|
|-
| AA1 
| - 60 °C
| + 5 °C
| colspan="4" rowspan="3"|
| rowspan="3"| Specially designed equipment or appropriate arrangements
|-
| AA2 
| - 40 °C 
| + 5 °C
|-
| AA3 
| - 25 °C
| + 5 °C
|-
| AA4 
| - 5° C 
| + 40 °C
| colspan="4"|
| Normal (special precautions in certain cases)
|-
| AA5 
| + 5 °C 
| + 40 °C
| colspan="4"|
| Normal
|-
| AA6
| + 5 °C
| + 60 °C
| colspan="4" rowspan="3"|
| rowspan="3"|Specially designed equipment or appropriate arrangements
|-
| AA7 
| - 25 °C
| + 55 °C
|-
| AA8
| - 50° C
| + 40 °C
|-
| {{tb-HC1}}|'''AB'''
| {{tb-HC1}} colspan="7" | '''Atmospheric humidity'''
|-
| {{tb-HC2}}|
| {{tb-HC2}} colspan="2" | '''Air temperature (°C)''' 
| {{tb-HC2}} colspan="2" | '''Relative humidity (%)''' 
| {{tb-HC2}} colspan="2" | '''Absolute humidity (g/m<sup>3</sup>)''' 
| {{tb-HC2}}|
|-
| 
| style="width: 65px" |Low 
| style="width: 65px" |High 
| style="width: 65px" |Low 
| style="width: 65px" |High 
| style="width: 65px" |Low 
| style="width: 65px" | High 
| 
|-
| AB1 
| - 60 °C 
| + 5 °C
| 3 
| 100 
| 0.003 
| 7 
| rowspan="3" | Appropriate arrangements shall be made
|-
| AB2 
| - 40 °C 
| + 5 °C 
| 10 
| 100 
| 0.1 
| 7 
|-
| AB3 
| - 25 °C 
| + 5 °C 
| 10 
| 100 
| 0.5 
| 7
|-
| AB4 
| - 5° C 
| + 40 °C 
| 5 
| 95 
| 1 
| 29 
| Normal
|-
| AB5 
| + 5 °C 
| + 40 °C 
| 5 
| 85 
| 1 
| 25 
| Normal
|-
| AB6 
| + 5 °C 
| + 60 °C 
| 10 
| 100 
| 1 
| 35 
| rowspan="3" | Appropriate arrangements shall be made
|-
| AB7 
| - 25 °C 
| + 55 °C 
| 10 
| 100 
| 0.5 
| 29 
|-
| AB8 
| - 50 °C 
| + 40 
| 15 
| 100 
| 0.04 
| 36
|-
| {{tb-HC1}}| '''AC'''
| {{tb-HC1}} colspan="7" | '''Altitude'''
|-
| AC1 
| colspan="6" | ≤ 2000 m
| Normal
|-
| AC2 
| colspan="6" | > 2000 m
| May necessitate precaution (derating factors)
|-
| {{tb-HC1}}| '''AD''' 
| {{tb-HC1}} colspan="7" | '''Presence of water'''
|-
| AD1
| colspan="2" | Negligible
| colspan="4" | Probability of presence of water is negligible
| IPX0
|-
| AD2 
| colspan="2" | Free falling drops 
| colspan="4" | Probability of presence of water is negligible
| IPX1 or IPX2
|-
| AD3 
| colspan="2" | Sprays 
| colspan="4" | Possibility of water falling as a spray at an angle up to 60° from the vertical
| IPX3
|-
| AD4 
| colspan="2" | Splashes 
| colspan="4" | Possibility of splashes from any direction
| IPX4
|-
| AD5 
| colspan="2" | Jets 
| colspan="4" | Possibility of jets of water from any direction
| IPX5
|-
| AD6 
| colspan="2" | Waves 
| colspan="4" | Possibility of water waves (seashore locations)
| IPX6
|-
| AD7 
| colspan="2" | Immersion 
| colspan="4" | Possibility of intermittent partial or total covering by water
| IPX7
|-
| AD8 
| colspan="2" | Submersion 
| colspan="4" | Equipment is permanently and totally covered
| IPX8
|-
| {{tb-HC1}}| '''AE''' 
| {{tb-HC1}} colspan="7" | '''Presence of foreign solid bodies or dust'''
|-
| {{tb-HC2}}|
| colspan="2" {{tb-HC2}}|
| colspan="2" {{tb-HC2}}| '''Smallest dimension'''
| colspan="2" {{tb-HC2}}| '''Example'''
| {{tb-HC2}}|
|-
| AE1 
| colspan="2" | Negligible 
| colspan="2" | 
| colspan="2" | 
| IP0X
|-
| AE2 
| colspan="2" | Small objects 
| colspan="2" | 2.5 mm 
| colspan="2" | Tools 
| IP3X
|-
| AE3 
| colspan="2" | Very small objects 
| colspan="2" | 1 mm 
| colspan="2" | Wire 
| IP4X
|-
| AE4 
| colspan="2" | Light dust 
| colspan="2" | 
| colspan="2" | 
| rowspan="2" | IP5X if dust penetration is not harmful to functioning<br>IP6X if dust should not penetrate
|-
| AE5 
| colspan="2" | Moderate dust 
| colspan="2" | 
| colspan="2" | 
|-
| AE6 
| colspan="2" | Heavy dust 
| colspan="2" | 
| colspan="2" | 
| IP6X
|-
| {{tb-HC1}}| '''AF''' 
| {{tb-HC1}} colspan="7" | '''Presence of corrosive or polluting substances'''
|-
| AF1 
| colspan="6" | Negligible 
| Normal
|-
| AF2 
| colspan="6" | Atmospheric 
| According to the nature of the substance
|-
| AF3 
| colspan="6" | Intermittent, accidental 
| Protection against corrosion
|-
| AF4 
| colspan="6" | Continuous 
| Equipment specially designed
|-
| {{tb-HC1}}| '''AG''' 
| {{tb-HC1}} colspan="7" | '''Mechanical shock'''
|-
| AG1 
| colspan="6" | Low severity 
| Normal, e.g. household and similar equipment
|-
| AG2 
| colspan="6" | Medium severity 
| Standard industrial equipment, where applicable, or reinforced protection
|-
| AG3 
| colspan="6" | High severity 
| Reinforced protection
|-
| {{tb-HC1}}| '''AH''' 
| {{tb-HC1}} colspan="7" | '''Vibrations'''
|-
| AH1 
| colspan="2" | Low severity 
| colspan="4" | Household or similar 
| Normal
|-
| AH2 
| colspan="2" | Medium severity 
| colspan="4" | Usual industrial conditions
| rowspan="2" | Specially designed equipment or special arrangements
|-
| AH3 
| colspan="2" | High severity 
| colspan="4" |Severe industrial conditions 
|-
| {{tb-HC1}}| '''AK''' 
| {{tb-HC1}} colspan="7" | '''Presence of flora and/or moulds growth'''
|-
| AK1 
| colspan="6" | No hazard
| Normal
|-
| AK2 
| colspan="6" | Hazard
| Special protection
|-
| {{tb-HC1}}| '''AL''' 
| {{tb-HC1}} colspan="7" | '''Presence of fauna'''
|-
| AL1 
| colspan="6" | No hazard
| Normal
|-
| AL2 
| colspan="6" | Hazard
| Special protection
|-
| {{tb-HC1}}| '''AM''' 
| {{tb-HC1}} colspan="7" | '''Electromagnetic, electrostatic or ionising influences / Low frequency electromagnetic phenomena / Harmonics'''
|-
| AM1 
| colspan="6" | Harmonics, interharmonics 
| rowspan="16"| Refer to applicable IEC standards
|-
| AM2 
| colspan="6" | Signalling voltage 
|-
| AM3 
| colspan="6" | Voltage amplitude variations 
|-
| AM4 
| colspan="6" | Voltage unbalance 
|-
| AM5 
| colspan="6" | Power frequency variations 
|-
| AM6 
| colspan="6" | Induced low-frequency voltages 
|-
| AM7 
| colspan="6" | Direct current in a.c. networks 
|-
| AM8 
| colspan="6" | Radiated magnetic fields 
|-
| AM9 
| colspan="6" | Electric field 
|-
| AM21 
| colspan="6" | Induced oscillatory voltages or currents 
|-
| AM22 
| colspan="6" | Conducted unidirectional transients of the nanosecond time scale 
|-
| AM23 
| colspan="6" | Conducted unidirectional transients of the microsecond to the millisecond time scale 
|-
| AM24 
| colspan="6" | Conducted oscillatory transients
|-
| AM25 
| colspan="6" | Radiated high frequency phenomena
|-
| AM31 
| colspan="6" | Electrostatic discharges
|-
| AM41 
| colspan="6" | Ionisation
|-
| {{tb-HC1}}| '''AN''' 
| {{tb-HC1}} colspan="7" | '''Solar radiation'''
|-
| AN1 
| colspan="6" | Low 
| Normal
|-
| AN2
| colspan="6" | Medium 
| rowspan="2" |
|-
| AN3
| colspan="6" | High
|-
| {{tb-HC1}}| '''AP''' 
| {{tb-HC1}} colspan="7" | '''Seismic effect'''
|-
| AP1 
| colspan="6" | Negligible 
| Normal
|-
| AP2 
| colspan="6" | Low severity 
| rowspan="3" |
|-
| AP3 
| colspan="6" | Medium severity
|-
| AP4 
| colspan="6" | High severity
|-
| {{tb-HC1}}| '''AQ''' 
| {{tb-HC1}} colspan="7" | '''Lightning'''
|-
| AQ1 
| colspan="6" | Negligible 
| Normal
|-
| AQ2 
| colspan="6" | Indirect exposure 
| rowspan="2" |
|-
| AQ3 
| colspan="6" | Direct exposure
|-
| {{tb-HC1}}| '''AR''' 
| {{tb-HC1}} colspan="7" | '''Movement of air'''
|-
| AR1 
| colspan="6" | Low 
| Normal
|-
| AR2 
| colspan="6" | Medium 
| rowspan="2" |
|-
| AR3 
| colspan="6" | High
|-
| {{tb-HC1}}| '''AS''' 
| {{tb-HC1}} colspan="7" | '''Wind'''
|-
| AS1 
| colspan="6" | Low 
| Normal
|-
| AS2 
| colspan="6" | Medium 
| rowspan="2" |
|-
| AS3 
| colspan="6" | High
|-
! colspan="8" | B - Utilization
|-
| {{tb-HC1}}| '''BA''' 
| {{tb-HC1}} colspan="7" | '''Capability of persons'''
|-
| BA1 
| colspan="6" | Ordinary 
| Normal
|-
| BA2 
| colspan="6" | Children 
| rowspan="4" |
|-
| BA3 
| colspan="6" | Handicapped
|-
| BA4 
| colspan="6" | Instructed
|-
| BA5 
| colspan="6" | Skilled
|-
| {{tb-HC1}}|'''BB''' 
| {{tb-HC1}} colspan="7" | '''Electrical resistance of human body (under consideration)'''
|-
| {{tb-HC1}}|'''BC''' 
| {{tb-HC1}} colspan="7" | '''Contact of persons with earth potential'''
|-
| BC1 
| colspan="6" | None 
| Class of equipment according to IEC61140
|-
| BC2 
| colspan="6" | Low 
| rowspan="3" |
|-
| BC3 
| colspan="6" | Frequent
|-
| BC4 
| colspan="6" | Continuous
|-
| {{tb-HC1}}| '''BD''' 
| {{tb-HC1}} colspan="7" | '''Condition of evacuation in case of emergency'''
|-
| BD1 
| colspan="6" | Low density / easy exit 
| Normal
|-
| BD2 
| colspan="6" | Low density / difficult exit 
| rowspan="3" |
|-
| BD3 
| colspan="6" | High density / easy exit
|-
| BD4 
| colspan="6" | High density / difficult exit
|-
| {{tb-HC1}}| '''BE''' 
| {{tb-HC1}} colspan="7" | '''Nature of processed or stored materials'''
|-
| BE1 
| colspan="6" | No significant risks 
| Normal
|-
| BE2 
| colspan="6" | Fire risks 
| rowspan="3" |
|-
| BE3 
| colspan="6" | Explosion risks
|-
| BE4 
| colspan="6" | Contamination risks
|-
! colspan="8" | C - Construction of building
|-
| {{tb-HC1}}|'''CA''' 
| {{tb-HC1}} colspan="7" | '''Construction materials'''
|-
| CA1 
| colspan="6" | Non combustible 
| Normal
|-
| CA2 
| colspan="6" | Combustible 
|
|-
| {{tb-HC1}}|'''CB''' 
| {{tb-HC1}} colspan="7" | '''Building design'''
|-
| CB1 
| colspan="6" | Negligible risks 
| Normal
|-
| CB2 
| colspan="6" | Propagation of fire 
| rowspan="3" |
|-
| CB3 
| colspan="6" | Movement
|-
| CB4 
| colspan="6" | Flexible or unstable
|}