Table 2 1 typical measured static charges in volts relative humidity item low 10 20 high 65 90 walking across carpet 35 000v 1 500v walking over vinyl floor 12 000v 250v worker at bench 6 000v 100v vinyl envelopes for work instruct.
10 20 humidity static electricity vinyl envelope.
During the summer the indoor humidity tends to be high.
Vinyl envelopes for work instructions 7 000 v 600 v.
Humidity and esd electrostatic voltages 10 20 rh 65 90 rh walking across carpet 35 000 1 500 walking over vinyl floor 12 000 250 worker at bench 6 000 100 vinyl envelopes for work instructions 7 000 600 common poly bag picked up from bench 20 000 1 200 common chair padded with polyurethane foam 18 000 1 500.
Walking across a carpet.
Walking on a vinyl tile floor 12 000 v 250 v.
Static electricity 1 like lightning.
Increasing humidity to 60 limits static build up because surface moisture on materials makes a good conductor.
Means of static generation.
Table 10 1 typical measured electrostatic voltages voltage levels relative humidity means of static generation low 10 20 high 65 90 walking across carpet 35 000 1 500 walking over vinyl floor 12 000 250 worker at bench 6 000 100 vinyl envelopes for work 7 000 600 instructions common poly bag picked up from 20 000 1 200 bench work chair padded with urethane 18 000 1 500 foam 10 16.
Static is rarely a problem.
Table 6 3 electrostatic voltage at workstations static voltage means of static generation relative humidity 10 20 relative humidity 65 90 walking across carpet 35 000 1 500 walking over vinyl floor 12 000 250 worker at bench 6 000 100 vinyl envelopes for work instructions 7 000 600 common polly bag picked up from bench 20 000 1 200 work chair padded with urethane foam 18 000 1 500.
7 000v 600v poly bag picked up from bench 20 000v 1 200v work chair padded with urethane form 18 000 v 1 500 v q 10.
Nfpa 77 1 batterymarch park quincy ma 02169 situation electrostatic voltages kv rh 10 20 rh 65 90 walking across a carpet 35 1 5 walking across a vinyl floor 12 0 25 working at a bench 6 0 1 vinyl envelopes for work instructions 7 0 6 poly bag picked up from bench 20 1 2.
Vinyl envelopes for work instructions.
The shock is from the build up of static electricity.
Walking on a vinyl tile floor.
Unfortunately 60 relative humidity is extremely uncomfortable can cause equipment problems and introduce contaminants into your system.
Walking across a carpet 35 000 v 1 500 v.
During the winter the humidity inside a heated space can be very low.
Two levels of relative humidity rh ref.
This increases the condutivity of most things enough that static charges are drained off.
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