I am looking for a good set of PPE. I have checked Whites,Salisbury,ect.and made a few phone calls. I prefer a complete kit as opposed to having to buy individual components. I Googled electrical PPE and found this link. http://www.aplussafety.net/products/store.cfm?d=3053&c=4548&p=16169&do=detail I called and the price for the 8 cal kit was $240 and 4 week delivery. Any comments, links, preferences, ect would be appreciated. Thanks Ken Dalton Electrical contractor Perry Florida
Ron Most of the work I perform on enegized equipment is 208/120 and 240 volt panels. I am starting a website with some usefull links. Take a look at the arc flash calculators and the videos. The The Mark Standifer Story is worth registering to see.Near the end of the video they give recomendations for ppe at different voltages. Here is a link to my site. http://www.gtcom.net/~kdal/taylor/county/florida/Dalton.html
Ken, There is a ton of work @ <240 that requires PPE greater than 2. Some people use Table 130.7(C)(9)(a) Hazard/Risk Category Classifications for their PPE selection in lieu of performing a detailed calculation. The two portions of the table that related to panelboards at 240 and below, require you to refer to Notes 1 and 3. There are lots of 240V installations that have short circuit currents in excess of 25kA and fault clearing time greater than 2 cycles.
If the short circuit currents is in excess of 25kA or the fault clearing time is greater than 2 cycles or you don't check either of those two items, then you cannot use that table and must perform the detailed calculation.
Notes: 1. Maximum of 25 kA short circuit current available, 0.03 second (2 cycle) fault clearing time.
3. For < 10 kA short circuit current available, the hazard/risk category required may be reduced by one number.
mxslick, It depends on the work type, fault current and clearing time for the upstream protective devices. The information is available in IEEE 1584 (detailed calculations) and NFPA 70E (chart and detailed calculations). NFPA 70E can be found at http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=70E click on preview this document.
The answer to your question about layering is yes, you can add them together.
Actually, if those 2 garmets were tested together as a multilayer garment they would probally have a rating around 40cal, but there is no way to know without actually testing them, but you can get your 23.6 cal.
I agree with Ron that you must be careful using the tables in the 70E, there are alot of limitations and you still need to know the fault current and clearing times.