| -- End Ad Box ---> | | | | minimum wear one of the following: |
| (Anchortex-AWS-2010-0001 - ) | | | | flame-resistant long-sleeved shirt and pants, OR |
| The 2009 edition of NFPA 70E requires employers | | | | flame-resistant coveralls. |
| to label any electrical equipment likely to require | | | | Additional PPE Equipment: Employees in HRC 2 |
| maintenance or examination while energized with | | | | situations are also required to at minimum be |
| clearly visible warning labels that alert personnel to | | | | wearing leather safety shoes, safety glasses, and |
| the hazard before they can be exposed to it. The | | | | a hard hat with an arc-rated face shield. In certain |
| most common way of doing so is to list a HRC | | | | circumstances, an 8+-cal/cm2 stocking hood or |
| (Hazard Risk Category) of required personal | | | | multi-layer switching hood may also be required. |
| protective gear needed to service the equipment | | | | Minimum Layer Requirements: HRC 2 requires one |
| in question. So what does this mean? | | | | to two layers of protective clothing. |
| Hazard Risk Category is defined within NFPA 70E | | | | Minimum Arc Rating in cal/cm2: 8 cal/cm2 |
| as a general classification of hazard involved in | | | | Hazard Risk Category 3 (HRC 3) |
| performing specified tasks. HRC typically ranges | | | | Minimum Clothing Requirements: In order to qualify |
| from zero to four, with zero denoting | | | | as covered under HRC 3, an employee must at |
| minimum-risk activities and four denoting high-risk | | | | minimum wear one of the following: a multi-layer |
| activities. Each category includes minimum safety | | | | flash suit over FR long-sleeved shirt and pants |
| equipment required, the minimum number of | | | | over natural fiber short-sleeved T-shirt and pants, |
| layers required to meet this requirement, and the | | | | OR a multi-layer flash suit over FR coveralls over |
| minimum arc rating of all required equipment in cal | | | | natural fiber short-sleeved T-shirt and pants. |
| cm2. The arc rating, in turn, is a value of the | | | | Additional PPE Equipment: Employees in HRC 3 |
| energy required to pass through a given material | | | | situations are also required to at minimum be |
| and cause a 50% probability of second to third | | | | wearing leather safety shoes, safety glasses, hard |
| degree burns. Arc ratings from multiple layers are | | | | hat, hearing protection, and a multi-layer switching |
| not cumulative. | | | | hood OR arc-rated goggle and stocking hood. |
| Hazard Risk Category 0 (HRC 0) | | | | Minimum Layer Requirements: HRC 3 requires two |
| Minimum Clothing Requirements: In order to qualify | | | | to three layers of protective clothing. |
| as covered under HRC 0, a long-sleeved shirt and | | | | Minimum Arc Rating in cal/cm2: 25 cal/cm2 |
| long pants made from natural fibers (untreated | | | | Hazard Risk Category 4 (HRC 4) |
| cotton, silk, wool, rayon, or blends of these | | | | Minimum Clothing Requirements: In order to qualify |
| fibers), with a minimum fabric weight of 4.5 | | | | as covered under HRC 4, an employee must at |
| ounces per square yard, is required. Polyester, | | | | minimum wear one of the following: a multi-layer |
| poly/cotton blends, and other artificial fibers are | | | | flash suit over FR long-sleeved shirt and pants |
| not permitted, as they will melt in an arc flash | | | | over natural fiber short-sleeved T-shirt and pants, |
| incident, increasing the potential damage. | | | | OR a multi-layer flash suit over FR coveralls over |
| Additional PPE Equipment: Employees in HRC 0 | | | | natural fiber short-sleeved T-shirt and pants. |
| situations are also required to at minimum be | | | | Additional PPE Equipment: Employees in HRC 4 |
| wearing leather safety shoes, safety glasses, and | | | | situations are also required to at minimum be |
| a hard hat. | | | | wearing leather safety shoes, safety glasses, hard |
| Minimum Layer Requirements: HRC 0 only requires | | | | hat, hearing protection, and a multi-layer switching |
| one layer of protective clothing. | | | | hood OR arc-rated goggle and stocking hood. |
| Minimum Arc Rating in cal/cm2: None. HRC 0 has | | | | Minimum Layer Requirements: HRC 4 requires at |
| no minimum requirements on arc rating of | | | | least three layers of protective clothing. |
| material. | | | | Minimum Arc Rating in cal/cm2: 40 cal/cm2 |
| Hazard Risk Category 1 (HRC 1) | | | | Depending on the specific tasks performed, |
| Minimum Clothing Requirements: In order to qualify | | | | employees may also be required to wear |
| as covered under HRC 1, an employee must at | | | | voltage-rated gloves and use voltage-rated tools |
| minimum wear one of the following: denim jeans | | | | appropriate to the equipment being serviced. |
| and a flame-resistant long-sleeved shirt, OR a | | | | Whenever possible, energized equipment to be |
| flame-resistant long-sleeved sirt and pants, OR | | | | serviced should be put into an electrically safe |
| flame-resistant coveralls. | | | | work condition unless the employer can |
| Additional PPE Equipment: Employees in HRC 1 | | | | demonstrate that de-energizing creates more |
| situations are also required to at minimum be | | | | severe hazards (such as when performing work |
| wearing leather safety shoes, safety glasses, and | | | | on life-support systems), or is not practical due to |
| a hard hat with an arc-rated face shield. | | | | limitations of equipment or operation (such as |
| Minimum Layer Requirements: HRC 1 only requires | | | | during testing of live equipment). Any service that |
| one layer of protective clothing. | | | | requires personal protective equipment should only |
| Minimum Arc Rating in cal/cm2: 4 cal/cm2 | | | | be performed by qualified personnel following a |
| Hazard Risk Category 2 (HRC 2) | | | | documented plan approved by the manager |
| Minimum Clothing Requirements: In order to qualify | | | | responsible for the plan. |
| as covered under HRC 2, an employee must at | | | | |