Wet And Dry Location Maximum Body Touch Voltage Duration

[mbrooke]

I am putting these values here, which can be used to help guide future objectives in articles 210.8, 210.13, 250, 517, 555 and 680. (And also the foundational ground work to loop and source conduction theory)


Wet Location:

Touch Voltage	Body R ohms	milli amps	Max Time Seconds
25 volts or less	1075	23	10
50	925	54	0.48
75	825	91	0.30
100	800	125	0.22
125	762	164	0.17
220	700	314	0.05
300	575	521	0.025

Dry Location:

Touch Voltage

Body R ohms

milli amps

Max time seconds

50 volts or less	1725	29	10
75 volts	1625	46	0.6
100 volts	1600	62	0.4
125 volts	1562	80	0.33
220 volts	1500	147	0.18
300 volts	1460	205	0.12
400 volts	1425	280	0.07

500 volts

1400

350

0.04

Medical Locations- general patient area only- body probes, leads, or subcutaneous conductive objects not taken into account:

Voltage Max	Duration Limit Seconds
12.5 volts	10
25 volts	5

60 volts	0.3
115 volts	0.05
200 volts	0.02

 

[mbrooke]

Well that sucks, the mesh failed

Anyway, further research and theoretical work needs to be done on body impedance while submerged in water and voltage gradients within water- fresh, salt, chlorine, lake, river, ect. This will be able to further give more precise values for automatic disconnection in articles 555 and 680, and also set a maximum impedance for equal potential bonding system design relative to their geometry and size.