Job Site Electrical Safety A Matter of Life and Death

Transcription

1 Job Site Electrical Safety A Matter of Life and Death Scott Forsyth, PE Senior Engineer Johnson Controls Performing the Job Right and on Time is Top Priority!!!! Right? Wrong!!!! Performing the Job Safely is Top Priority!!!! Every employee needs to go home to their family intact!!!! 1

2 NFPA 70E Risk and PPE Requirements Hazard Risk Category 1 Hazard Risk Category 2 Hazard Risk Category 3 Hazard Risk Category 4 Clueless PEs Hazard Risk Category 5

3 Outline Electrical Injury Risks NFPA 70E Standard for Electrical Safety in the Workplace Job Site Electrical Accident and Injury Demonstration NFPA 70E and OSHA Company and Personal Liability and Risks 25 Minute Electrical Safety Training Video by Fluke (CD is free!!) Benefit to Cost and Risk Ratio of TAB Measurements Anonymous Company Safety Program Survey Discussion if Time Allows 3

4 Electrical Injury Risks - Electrocution 4

5 Electrical Injury Risks - Electrocution 5

6 Electrical Injury Risks Arc Flash Burns 6

7 Electrical Injury Risks Arc Flash Burns 7

8 Electrical Injury Risks - Death 8

9 US Workers Electrical Injury Facts 9

10 Worker Electrical Safety 10

11 NFPA 70E Risk Categories

12 NFPA 70E Risk Categories

13 NFPA 70E Risk and PPE Requirements Hazard Risk Category 0 Hazard Risk Category 1 Hazard Risk Category 2 Hazard Risk Category 3 Hazard Risk Category 4

14 NFPA 70E Risk and PPE Requirements Personal Protective Equipment (P.P.E.) Requirements. Hazard/Risk Category Eye protection, ear canal inserts, long sleeve shirt and pants Arc rated clothing Face & Head Protection Flash Suit Hood

15 Job Site Electrical Accident and Injury Demonstration 35 Years of Live Electrical Test Measurements by a NEBB Supervisor without Injury is Proof of Safe Procedures and Practices 15

16 Job Site Electrical Accident and Injury Demonstration 35 Years of Live Electrical Test Measurements by a NEBB Supervisor without Injury is Probably More Attributable to Luck 16

17 17

18 Live Electrical Demo Safety and Good Practice Violations PPE: eye protection safety glasses PPE: long sleeve shirt and pants cotton and not synthetics PPE: ear plugs PPE: flash rated overalls PPE: face and hood protection Athletic shoes instead of heavy duty work shoes or boots Jewelry and watches Performing live measurements alone Inserting both hands inside the panel to make the measurement (current flowing through chest and heart is a killer). Consider a spring loaded alligator clip tip with an integral electrical insulator on external edges that may be clipped on a ground connector allowing only one hand to be inserted into the live panel. Using inexpensive and short probes. Alternatively, use long probes 18 with short metal tips.

19 Job Site Electrical Accidents Caused by Murphy s Law and Bad Luck Electrical fuse or circuit breaker just happens to fail catastrophically while you have the panel door open due to an electrical transient Your electric meter just happens to fail while you are making the live measurement You just happen to be bumped by another contractor s employee who was being careless while working and backed up in to you as you were making the live electrical measurement Just as the panel is opened a loose wire or nut inside the panel just happens to move or fall causing an arc Any number of other potential failures or causes while you are making the live electrical measurement that you have no control of 19 Scott Forsyth, PE

20 Worker Electrical Safety & NFPA 70E 20

21 Worker Electrical Safety & NFPA 70E 21

22 Worker Electrical Safety & NFPA 70E 22

23 Company and Personal Liability and Risks 23

24 Company and Personal Liability and Risks 24

25 Company Safety Program Free Resources from Fluke 25

26 Company Safety Program Free Resources from Fluke 26

27 Benefit to Cost & Risk Ratio in Performing TAB Measurements Benefit to Cost & Risk Considerations: Just don t perform measurement because we always have in past What is the real benefit in making a measurement such as voltage on a large 480 volt 3 phase AHU or pump motor or Electric duct heater (likely not wired to 208 volt source)? Cost should include time to acquire and put on PPE Cost should consider risk making high voltage measurement has high risk 27

28 Benefit to Cost & Risk Ratio Should Some Shalls be May? 28

29 Anonymous NEBB Member Safety Program Survey 29

30 Anonymous NEBB Member Safety Program Survey 30

31 Time for Discussion? What is general status of company safety programs in TAB industry? Do small firms lack necessary resources? Why don t more TAB technicians use PPE? Lack of knowledge? Lack of PPE? Competitive pressures on man hour estimates translate to shortcuts in field? How can NEBB and FEBB help? Should NEBB develop a safety training program that can be used by NEBB certified firms? What changes can you make to help ensure your employees go home to their families intact? 31