wma spring 2018 shoptalk - electric shock...

3/20/2018

1

03/16/2018 Ed Lethert

Electric Shock DrowningElectric Shock Drowning

Edward Edward "Ed""Ed" LethertLethert

El t i Sh k D iEl t i Sh k D iElectric Shock Drowning Electric Shock Drowning Safety SpecialistSafety Specialist

Member of the Member of the

03/16/2018 Ed Lethert 2

Electric Shock DrowningElectric Shock DrowningPrevention AssociationPrevention Association

3/20/2018

2

Electric Shock DrowningElectric Shock Drowning

Electric Shock Drowning Electric Shock Drowning Prevention AssociationPrevention Association

AwarenessAwareness

EducationEducation

Miti tiMiti ti

03/16/2018 Ed Lethert 3

MitigationMitigation

Founded on July 15th 2011Founded on July 15th 2011

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 4

3/20/2018

3

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 5

James D. ShaferJames D. ShaferAcreditedAcredited Marine SurveyorMarine Surveyor

Began investigating marine leakage currents in 1999Began investigating marine leakage currents in 1999

Electric Shock DrowningElectric Shock Drowning

Shock AlertShock AlertShock AlertShock Alert

InIn--Water Voltage Water Voltage

Gradient TesterGradient Tester

03/16/2018 Ed Lethert 6

Gradient TesterGradient Tester

3/20/2018

4

Electric Shock DrowningElectric Shock Drowning

SHOCK ALERT

03/16/2018 Ed Lethert 7

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 8

3/20/2018

5

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 9

Electric Shock DrowningElectric Shock Drowning

FountainsDecorative

Pools

03/16/2018 Ed Lethert 10

3/20/2018

6

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 11

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 12

3/20/2018

7

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 13

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 14

3/20/2018

8

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 15

Electric Shock DrowningElectric Shock Drowning

Marina Marina

Ground Fault Ground Fault

Current Current

03/16/2018 Ed Lethert 16

MeasurementsMeasurements

3/20/2018

9

National Electrical CodeNational Electrical Code

03/16/2018 Ed Lethert 17

National Electrical CodeNational Electrical Code

03/16/2018 Ed Lethert 19

3/20/2018

10

National Electrical CodeNational Electrical Code

03/16/2018 Ed Lethert 20

National Electrical CodeNational Electrical Code

03/16/2018 Ed Lethert 21

3/20/2018

11

Electric Shock DrowningElectric Shock Drowning

NEC UpdateNEC Update

03/16/2018 Ed Lethert 22

Electric Shock DrowningElectric Shock Drowning

ABYC E-11NFPA 70 — NEC

03/16/2018 Ed Lethert 23

Marina Power

Shore Cord

NFPA 302NFPA 303

3/20/2018

12

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 24

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 25

3/20/2018

13

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 26

Electric Shock DrowningElectric Shock Drowning

Typical Dock Electrical Distribution

MAIN FEEDER BRANCH(Pedestal)

R

03/16/2018 Ed Lethert

3/20/2018

14

Electric Shock DrowningElectric Shock Drowning

Typical Dock Electrical Distribution

2011 / 2014 NEC

… or … … or …MAIN FEEDER BRANCH(Pedestal)

R100 mA 100 mA 100 mA

03/16/2018 Ed Lethert

Electric Shock DrowningElectric Shock Drowning

Typical Dock Electrical Distribution

2011 / 2014 NEC

MAIN FEEDER BRANCH(Pedestal)

R100 mA

03/16/2018 Ed Lethert

3/20/2018

15

Electric Shock DrowningElectric Shock Drowning

Typical Dock Electrical Distribution

2011 / 2014 NEC

MAIN FEEDER BRANCH(Pedestal)

R30 mA

03/16/2018 Ed Lethert

Electric Shock DrowningElectric Shock Drowning

Typical Dock Electrical Distribution

2017 NEC

… and …

30 mA 30 mA

… and …MAIN FEEDER BRANCH(Pedestal)

R30 mA

03/16/2018 Ed Lethert

3/20/2018

16

Electric Shock DrowningElectric Shock Drowning

Typical Dock Electrical Distribution

2017 NEC

30 mA 30 mA

… and …MAIN FEEDER BRANCH(Pedestal)

R30 mA

03/16/2018 Ed Lethert

Tentative Interim Agreement 1348

(TIA 1348)

Electric Shock DrowningElectric Shock Drowning

R tiR tiReaction Reaction to the to the

2017 NEC2017 NEC

03/16/2018 Ed Lethert 33

2017 NEC2017 NEC

3/20/2018

17

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 34

National Electrical CodeNational Electrical Code

03/16/2018 Ed Lethert 35

3/20/2018

18

National Electrical CodeNational Electrical Code

03/16/2018 Ed Lethert 36

National Electrical CodeNational Electrical Code

03/16/2018 Ed Lethert 37

3/20/2018

19

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 38

Electric Shock DrowningElectric Shock Drowning

Inspect Dock WiringInspect Dock Wiring

03/16/2018 Ed Lethert 39

3/20/2018

20

Electric Shock DrowningElectric Shock Drowning

Condition of Receptacles Condition of Receptacles

Circuit Breakers

Wiring and Connections

Electrical Ground Integrity

Circuit Breakers

Wiring and Connections

Electrical Ground Integrity

03/16/2018 Ed Lethert 40

g y

Line Voltage

g y

Line Voltage

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 41

3/20/2018

21

Electric Shock DrowningElectric Shock Drowning

Test The BoatsTest The Boats

03/16/2018 Ed Lethert 42

Electric Shock DrowningElectric Shock Drowning

AC Neutral to AC Ground Connection

AC Ground to DC Negative Bond

Leakage Current into the Water

AC Neutral to AC Ground Connection

AC Ground to DC Negative Bond

Leakage Current into the Water

03/16/2018 Ed Lethert 43

gg

3/20/2018

22

Electric Shock DrowningElectric Shock Drowning

Pass/fail test of boats returning to marina following installation of new docks:Pass/fail test of boats returning to marina following installation of new docks:

86 Boats Tested

69 Boats Failed the Test(no longer than 22 minutes)

86 Boats Tested

69 Boats Failed the Test(no longer than 22 minutes)

03/16/2018 Ed Lethert 44

61 Failed Immediately

Cliff Norton, Bellingham Marine Industries, 2018

61 Failed Immediately

Cliff Norton, Bellingham Marine Industries, 2018

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 45

3/20/2018

23

Electric Shock DrowningElectric Shock Drowning

The MK-5 Tester verifies:

• The AC ground is notThe AC ground is not bonded to the AC neutral

• The existence of the AC ground to DC negative bond

• The integrity of the AC

03/16/2018 Ed Lethert 46

ground path (the only practical way when GFP

is installed)

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 47

3/20/2018

24

Electric Shock DrowningElectric Shock Drowning

ESD Warning SignsESD Warning Signs

03/16/2018 Ed Lethert 48

National Electrical CodeNational Electrical Code

Warning Signs required stating

"WARNING - POTENTIAL SHOCK HAZARD - ELECTRICAL CURRENTS MAY BE PRESENT IN THE WATER."

03/16/2018 Ed Lethert 49

3/20/2018

25

Electric Shock DrowningElectric Shock Drowning

Required by

03/16/2018 Ed Lethert 50

the 2017 NEC

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 51

3/20/2018

26

Electric Shock DrowningElectric Shock Drowning

ESD FliersESD Fliers

03/16/2018 Ed Lethert 52

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 53

3/20/2018

27

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 54

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 55

3/20/2018

28

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 56

Electric Shock DrowningElectric Shock Drowning

ELECTRIC SHOCK DROWNING PREVENTION ASSOCIATION

www.electricshockdrowning.org

03/16/2018 Ed Lethert 57

Electric Shock Drowning Resource Center

www.boatus.com/seaworthy/ESD.asp

3/20/2018

29

Electric Shock DrowningElectric Shock Drowning

03/16/2018 Ed Lethert 58