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Nuked345kv replied to the thread Arc Rated Gloves Dexterity?.

well here is the thing, working in a nuclear power plant we have some unit sub stations that after and engineering evaluation some of the...

PaulEngr replied to the thread Calculation for new piece of machinery.

Almost! If there is a significant motor contribution, it may increase the incident energy of not only the new equipment but also the old...

PaulEngr replied to the thread Not sure equations would match the physics.

There is definitely evidence for a lack of self sustaining conditions at the lower voltages. Right now 1584 has a cutoff of 240 V fed from...

PaulEngr replied to the thread Arc Rated Gloves Dexterity?.

First, at 65 cal/cm^2, the arc blast alone is likely to kill you. The reason that the charts, tables, etc., stop at 40 cal/cm^2 is that you...

Moeen ud Din replied to the thread Motor contribution.

Motor contribution is normally for five cycle it means that in an event of the short circuit motor will be acting as a generator because of...

ETAP has a new avatar.

jcampbell replied to the thread Hearing Protection.

smak, I answering your question about where it is at in OSHA/NFPA 70E-I can not find anywhere specifically that states you can not wear a...

Moeen ud Din replied to the thread ETAP and SKM on same computer: ETAP Report Creation Problem.

I think SKM has taken some resources of ETAP but not sure how to fix it. It waste lots of time when every time I have to uninstall and...

JBD replied to the thread Not sure equations would match the physics.

There is nothing preventing you from using some other value. It is just there is currently no industry accepted methodology which you can...

jcampbell replied to the thread Just Learning.

dupton, I can't give you exact answers for your questions but may provide some insight. On testing, manufacturers do have to meet a...

jghrist replied to the thread Calculation for new piece of machinery.

It would be if the new equipment is served from the same panel, has the same breaker type & rating, the same wire size & type, the same...

JJH liked JBD's post in the thread Is operation of circuit breaker handle a system interaction?.

We need to do a better job clarifying what equipment we are discussing. A switch means something different to 'residential' electrician...

Nuked345kv posted a new thread.

Arc Rated Gloves Dexterity?

Hello all, i just joined up as i have been tasked with bringing up our stations safety standards and doing a little research into 70E it...

Forum: Personal Protective Equipment (PPE)

FEC2 attached a file to the thread Not sure equations would match the physics.

The Mersen paper is an interesting read. There is certainly a lot to try to model during a brief span of time. The zero-crossing...

Zog posted a new thread.

Motor contribution

Someone told me yesterday that ETAP has an option to limit motor contribution current to 2 cycles, can anyone explain this? He thought it...

Forum: General Discussion