Article 90 IntroductionSection 90.2(A) (Revision)This section now uses a very important word: “inspection.” Electrical inspectors also can be exposed to hazards during inspections of installations, and this standard will now cover them. The proposed language reads: “This standard addresses electrical safety requirements for employee workplaces that are necessary for the practical safeguarding of employees during activities such as the installation, inspection, operation …” (emphasis added).Section 90.2(A)(4) (Revision)The words at the end of this section, “… that are not an integral part of a generating plant, substation or control center …” will be deleted, and this section will now read: “Installations used by the electric utility, such as office buildings, warehouses, garages, machine shops and recreational buildings.” This deletion clarifies that NFPA 70E applies to these areas, even if they are part of a generating plant, substation or control center.
Changes Throughout DocumentArc-Rated (New) The 2012 edition of NFPA 70E will use the term “arc-rated” or “AR” before any reference to “flame-resistant” or “FR.” The term “arc-rated” refers to a material property or attribute in terms of a material’s performance when exposed to an electric arc. Arc-rated material is flame-resistant, but flame-resistant material may not be arc-rated.Ebt= Energy of break open thresholdFine Print Note (Revision) The term “fine print note (FPN)” is changing to “informational note.” This change provides consistency between the National Electrical Code (NEC) and NFPA 70E.
Article 110 General Requirements for Electrical Safety-Related Work PracticesSection 110.1(C) (New)This section is new to the code and will require a documented meeting between the host employer and contract employer.
Article110.6(C) Emergency Procedures (Revision)The 2012 edition will require the use of an automatic external defibrillator (AED) in addition to the existing requirement of training and employer certification of cardiopulmonary resuscitation (CPR).
Paragraph 110.2(D)(1)(f) – Qualified Person TrainingThe employer shall use regular supervision or inspections on atleast an annual frequency to determine employee compliancewith this standard. The OSHA law of CFR 1910.269(a)(2)(iii) isstricter, requiring supervision AND inspections.Paragraph 110.2(D)(3) – Employee RetrainingIn addition to retraining for non-compliance, new equipment, orunfamiliar procedures, retraining shall be performed every threeyears or more frequently.Paragraph 110.2(E) – Training DocumentationThe employer must now retain a description of training contentin addition the employees’ names and date of the training.
Paragraph 110.3(H) – Electrical Safety AuditingThis new section requires the employer’s electrical safetyprogram be audited at least every three years. This auditis to include field work, not just a review of paperwork. Ifdiscrepancies are identified in the audit, appropriate changesin training or procedures shall be implemented. The audit shallbe documented.
Paragraph 130.2 – Electrically Safe Working conditionsThere were revisions in the arrangement of this Article. Thisparagraph could require placing the equipment into anelectrically safe work condition more often. If the employeewill be within the limited approach boundary, or the employeeis interacting with equipment that has an increased chance ofcreating an arc flash, the equipment must be de-energized. Anexample is switching a circuit breaker that has not been properlyMaintained.Section 130.1 (Relocation and New Section)The 2012 edition will feature Section 130.1 renumbered as 130.2. Proposed language for a new 130.1 states: “All requirements of this article shall apply whether an incident energy analysis is completed or if the tables 130.7(C)(9) and (C)(10) are utilized in lieu of incident energy analysis.” The new language is intended to help clarify that, when the table method is used, the other requirements of this section, such as providing proper justification and completing the energized work permit, still apply.Section 130.1(A) General (Revision)The 2009 edition requires that energized conductors or circuit parts be placed into an electrically safe working condition before an employee works within the LAB. New language expands this requirement to apply if any of the following conditions exist:• The employee is within the LAB (same as before)• The employee interacts with equipment where conductors or circuit parts are not exposed, but an increased risk of arc flash hazard exists• An informational note is added that refers to the definition of “arc flash hazard” in Article 100.Section 130.1(B)(1) Where Required (Revision)The proposed text changes and additions include “When working within the limited approach boundary or the arc flash boundary of exposed energized electrical parts … .” This language is intended to help clarify when the code requires an energized work permit.
Deletion of Former Paragraph 130.3 Exception No. 1The prior edition did not require arc flash hazard analysis forcertain circuits 240 volt and less supplied by small transformers.This exception was rescinded. Now in 130.5 InformationalNote No. 5 it refers to the IEEE 1584 Standard for any detailsregarding these circuits.Section 130.3 Exception No. 1 (Revision)This exception is based on language found in Institute of Electrical and Electronics Engineers (IEEE) Std. 1584—Guide for Performing Arc-Flash Hazard Calculations. Exception 1 stated that an arc flash hazard analysis shall not be required on circuits rated 240 volts (V) or less and supplied by one transformer if the transformer is less than 125 kilovolt-amperes.
DC shock protection information was added to the new table130.4(C)(b). It has the same format as the AC table which istable 130.4(C)(a).
The required labeling has significantly changed. The 2009edition started the requirement for arc flash analysis equipmentlabeling. This prior edition only required field marking onequipment displaying available incident energy or required levelof PPE.The new edition is more specific with the equipment requiringlabels. Only equipment that would be worked on in an energizedstate requires the labeling.The labels have to include the following three lines of information1) At least one of the followinga. Available incident energy and the correspondingworking distance orb. Minimum arc rating of clothing orc. Required level of PPE ord. Highest Hazard/Risk Category (HRC) for the equipment2) Nominal system voltage3) Arc flash boundaryThe one exception is that if the labels were applied prior toSeptember 30, 2011, they are acceptable if they contain theavailable incident energy or required level of PPE.The method of calculating and supporting data shall be documented.
The required labeling has significantly changed. The 2009edition started the requirement for arc flash analysis equipmentlabeling. This prior edition only required field marking onequipment displaying available incident energy or required levelof PPE.The new edition is more specific with the equipment requiringlabels. Only equipment that would be worked on in an energizedstate requires the labeling.The labels have to include the following three lines of information1) At least one of the followinga. Available incident energy and the correspondingworking distance orb. Minimum arc rating of clothing orc. Required level of PPE ord. Highest Hazard/Risk Category (HRC) for the equipment2) Nominal system voltage3) Arc flash boundary
The one exception is that if the labels were applied prior toSeptember 30, 2011, they are acceptable if they contain theavailable incident energy or required level of PPE.
Paragraph 130.7(C)(5)– Additional Requirement for Hearing ProtectionEmployees shall wear hearing protection when working within the arc flash boundary. The existing requirement has beento wear hearing protection in HRC 0 or higher locations ifperforming a listed task.Paragraph 130.7(C)(9)– Restriction with Arc Rated ClothingSystems Using other ClothingThe rating of a clothing system can not be increased by use ofnon-arc rated clothing.Paragraph 130.7(C)(10)(b)– New Requirements for Head ProtectionAn arc rated balaclava or arc rated hood shall be worn when the back of the head is within the arc flash boundary. An arc ratedhood shall be worn when the hazard exposure is over 12 cal/cm2.Paragraph 130.7(C)(10)(d)– Modified Requirements forHand ProtectionThe requirement for leather gloves or FR gloves was changed to heavy duty leather gloves or arc rated (AR) gloves. TheInformational Note describes what is considered a heavy dutyleather glove.
Table 130.7(C)(15)(a)– Hazard Risk Categories with ACVoltagesThis table name was changed from 130.7(C)(9) to 130.7(C)(15)(a). The content changed as follows:The conditions of applicability were relocated from footnotes to the equipment headings. For example, apanelboard with voltages >240 up to 600 has a maximumof 25kA short current available, maximum clearing time ofupstream protection of 2 cycles, and a minimum workingdistance of 18 inches. If the equipment does not conformto the conditions, the calculation method must be used forincident energy analysis per 130.7(C)(15).2) The equipment descriptions now include the arc flash boundary distance based on the conditions of applicability.3) The hazard risk category (HRC) 2* was replaced with HRC2. In essence HRCs 2 and 2* were combined and thestricter PPE requirements of HRC 2* now apply to the HRC2.4) The prior equipment category of “Panelboards or Switchboards Rated >240 V and up to 600 V” was modifiedto “Panelboards or other equipment rated >240 V and up to600 V,” deleting “Switchboards.”5) The equipment category 600 V class motor control center(MCC) was split into to two sections with differing conditions.The first category pertains to working within the buckets.The second section pertains to interacting with a bus.
Table 130.7(C)(15)(b)– New - Hazard Risk Categories withDC VoltagesA new table for hazard risk categories was added for DC equipment. It is in a similar format as the AC equipment table.The maximum voltage range included is 600 volts DC. Guidanceis given in Informative Annex D in section D.8 on calculating DCincident energy where the equipment is not covered in the new table.
Changes to Chapter 2 – Safety RelatedMaintenanceRequirementsSection 205.2– Single Line DiagramThe added requirementstates that, “A single-linediagram, where providedfor the electrical system,shall be maintained in alegible condition and shall be kept current.” This is not requiringa single-line diagram, but if one is used, it has to be readableand be updated.Section 205.3 – General MaintenanceEquipment must be maintained IAW manufacturers’ instructions or industry consensus standards to reduce the risk of failure and subsequent exposure of employees to electrical hazards. Section 205.4 – Added Requirement for OvercurrentProtective DevicesMaintenance, tests, and inspections shall be documented. Thispertains to the required maintenance in section 205.3.
Article 110.3(F)Identification and Risk Assessment ProcedureRequires employees to identify hazards and assess risks prior to starting work.
NFPA 70E Technical Committee reports to NEC Technical Correlating Committee reports to NFPAStandards Council EEI Representatives to the TC:• Mike Madrigal, KCP&L (Principal)http://esafetyline.com/eei/conference%20pdf%20files/EEIfall2012/WashingtonUpdate_MichaelMadrigal.pdfReceived 462 Public input CommentsCreated 168 first Revisions
Offshc nfpa 70 e
Presented to: Oklahoma FFHSC Date: November 1, 2012Presented by: Stephanie Schroeder, CSP
Definitions Documentation Training Program Audits Hazard/RiskCategory Tables DC System Hazards
Arc-rated (AR) • Previously flame resistant (FR) • Reported in ATPV or EBT • AR is FR, but FR is not AR Informational note • Previously fine print note Incident energy analysis Arc flash protection boundary
Approach Boundaries Review Any point on an exposed, energized electrical conductor or circuit part Prohibited approach boundary Restricted approach boundary Limited approach boundary Arc Flash Boundary
Relationships with Contractors Article 110.1(C) • Required meeting between host employer and external contractor • Must be documented
Training Requirements for Emergencies Article 110.2(C) • Automatic external defibrillator (AED) training shall be certified by the employer annually
Training Requirements for Employees Article 110.2 • Employer must determine employee compliance with this standard annually • Employee retraining every 3 years • Employer must retain description of content
Electrical Safety Auditing Article 110.3(H) • Audit of employers electrical safety program • Including field work • Frequency must not exceed 3 years • Must be documented
Electrically Safe Working Conditions, Article 130.2(A) • Rearrangement of the article may require equipment to be de-energized more often • Within the Limited Approach Boundary (LAB) • Equipment interaction with increased risk Energized work permit, Article 130.2(B) • Diagnostics work exemptions still apply
Arc Flash Hazard Analysis 2009 Article 130.3, Exception No. 1 • Allowed exception to AFHA for certain systems less than 240 volts supplied by small transformer Rescinded in 2012 Article 130.5, Informational Note No. 5 • Refer to IEEE 1584 for three-phase systems rated less than 240 volts
DCShock Protection Boundaries Article 130.4(C)(a) • Similar in format to the AC boundaries • Minimum voltage addressed is 100 VDC
AFHA Equipment Labeling Article 130.5(C) • Equipment likely to require maintenance, servicing, adjustments while energized shall be field marked with a label
AFHA Equipment Labeling Article 130.5(C) • The labels have to include the following three lines 1) At least one of the following a. Available incident energy and the working distance or b. Minimum arc rating of clothing or c. Required level of PPE or d. Highest Hazard/Risk Category (HRC) • 2) Nominal system voltage • 3) Arc flash boundary
AFHA Equipment Labeling Article 130.5(C) • ONE EXCEPTION: Labels applied prior to September 30, 2011 and when they contain available incident energy or required level of personal protective equipment
Personal Protective Equipment Article 130.7(C) • Hearing Protection • AR Clothing Systems • Head Protection • Modified Hand Protection
HazardRisk Categories (AC Voltages) Table 130.7(C)(15)(a) • Conditions were moved into the tables • Descriptions now include arc flash boundaries • HRC2* removed and replaced by HRC2
HazardRisk Categories (DC Voltages) Table 130.7(C)(15)(b) • Similar in format to the AC equipment table • Based on energized work and arcing currents • Maximum voltage range is 1000 VDC
Safety Related Maintenance Article 205 • Single line diagrams must be current and legible • Equipment must be maintained IAW manufacturers’ instructions • Maintenance, tests and inspections of overcurrent devices must be documented.
HazardAnalysis, Risk Estimation and Risk Evaluation Procedure - Annex F • Provides a model for evaluating hazards • Identifies hazards and assess risks • Completed prior to starting work
Public comments closed 6/22/13 • Definition of Qualified Person • Risk Assessment Procedures • Emergency response • Focus on training/retraining documentation • Deletion of PPE Category 0 • Yes/No tables for arc flash hazards Technical Committee draft due 2/8/13
NFPA.org http://www.nfpa.org/AboutTheCodes/About TheCodes.asp?docnum=70E&tab=nextedi tion Disclaimer: Only significant changes were highlighted in this briefing, please refer to the 2012 NFPA 70E for details.
Stephanie Schroeder • FAA, Mike Monroney Aeronautical Center, OKC • Stephanie.firstname.lastname@example.org • 405-954-0371
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