Personal and Other Protective Equipment
This is also, in my opinion, a great change. So, generally speaking, employees have to wear rubber-insulating gloves with leather protectors. So we know that. But what's new? Rubber-insulating gloves shall be permitted to be used without leather protectors if we can satisfy these conditions, no activity that's going to risk cutting or damaging the glove, the gloves have been electrically retested after I do this, and the voltage rating of the rubber-insulating gloves shall be reduced by 50% for class 00 and one whole class for the classes 0 through 4. So because we don't have the leather protector on, they're going to reduce the rating of that glove. But if I took a class 0 glove, which is rated for 1,000 volts AC, and if I was going to use it without the leather protector, it would now be good for, a class 00, which is 500 volts AC. So I could still work around 480 with that class 0 glove, and I wouldn't have to put a leather protector on there as long as it wasn't going to risk the chance of it getting cut or damage whatever I was doing. A good example would that be if I had a large cabinet, and I had multiple voltages in there, and I had to protect myself to that higher voltage, but all I was really doing was going through the display of a variable-frequency drive. Well, I know I have forwarded it to my left, and I know it's exposed, and I know I'm supposed to wear the PPE, but those leather protectors make it a little tough on dexterity. So if I could take those off, then I could scroll through the display of that drive very easily.
Some standards for personal protective equipment that changed conformity assessment. So now when we purchase our personal protective equipment, the manufacturer or the supplier has to demonstrate that it does conform with the appropriate product standard, and they have three ways that they can do this. They can self-declare that it conforms, they can self-declare under a registered quality management system, or, number three, the one that we're most familiar with, probably, certification by an accredited independent third-party certification organization. So that's the one that, you know, would be UL, or ETL, or CSA, or TUV. Any of those would satisfy this requirement here.
Marking on my personal protective equipment. So everybody that supplies or manufactures us PPE has to provide us with some information. And somewhere it's got to be on there who actually manufactured it, so the name of the manufacturer, the product standard that it conforms to, the arc rating, so we're going to have to know how many calories per centimeter squared that clothing is, and then we need some identifiers, models, a serial number, traceability code. And then how to take care of that personal protective equipment, so how we're going to launder it, things like that. So that all now has to be on our clothing.
Okay. So this is a great change, in my opinion. Now, we are looking at method number two to generate our labels and our personal protective equipment, what we might have to wear, so this is the PPE category method. Table 130.7(C)(15) has been in these editions of 70E for the past three cycles. If we look at it, we can see some equipment to the left. And if we look at the very first one, "Panelboards or other equipment rated 240 volts and below." So that's great. Well, people might want to just say, "Oh, you know what, I've got a 20842 circuit lighting panel over here, so I know it must be PPE category one." Well, you can't really say that, because voltage is not one of the determining factors of incident energy.
You can see underneath that statement, "Panelboards or other equipment rated 240 volts and below," we have parameters. So to be able to use this table, we have to satisfy those parameters. And so the fault current, it cannot be over 25,000 amps, and our clearing time can't be more than 2 cycles. And the fault current was always pretty easy to calculate. There's a lot of different ways we can do that. I have an app on my phone I can do it with. I've got software I can do it with. I've got a nice, little, tiny formula that we can actually even do longhand. But declaring time was another issue. So what have they done? They put some informational notes to this table and told us that, for current-limiting fuses, those are going to have a typical clearing time of a half a cycle. For molded case breakers less than 1,000 volts with an instantaneous integral trip, one and a half cycles. So this is excellent that they have given us some guideline with clearing time. And I can tell you that people that come to our 72-day seminars, we really go through this method a lot, because, if it's a smaller facility and they don't have labels, this is an easy way to at least get the worker in the right PPE.
Now I want to give you an idea that TPC Trainco has now gone to some online courses. You don't always have to come and sit in a hotel room, and we don't always have to come to you. And so one of our online courses that we're going to be looking at is going to be on October 13th, and it is going to go through, not just the changes of NFPA 70E, but the implementation of it. And I'm going to be actually teaching that course, so I'll be doing that on October 13th. And I'm going to give you an idea how to calculate fault current, and I'm going to give you an idea how to use method number two and satisfy all those parameters. I'm going to do a lot of risk assessments. So that's going to be a nice course. It'll be the one of three that I'm doing that week. So I'm doing a code class that week and some grounding and bonding, and then I'm going to do safety on the end of that week. So if you get a chance, would love to have you take the opportunity and be able to ask some really good in-depth questions, and we'd be able to walk right straight through NFPA 70E on that day.