wma spring 2018 shoptalk - electric shock...
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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
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Electric Shock DrowningElectric Shock DrowningPrevention AssociationPrevention Association
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Electric Shock DrowningElectric Shock Drowning
Electric Shock Drowning Electric Shock Drowning Prevention AssociationPrevention Association
AwarenessAwareness
EducationEducation
Miti tiMiti ti
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MitigationMitigation
Founded on July 15th 2011Founded on July 15th 2011
Electric Shock DrowningElectric Shock Drowning
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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
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Gradient TesterGradient Tester
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Electric Shock DrowningElectric Shock Drowning
SHOCK ALERT
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Electric Shock DrowningElectric Shock Drowning
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Electric Shock DrowningElectric Shock Drowning
FountainsDecorative
Pools
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Electric Shock DrowningElectric Shock Drowning
Marina Marina
Ground Fault Ground Fault
Current Current
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MeasurementsMeasurements
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National Electrical CodeNational Electrical Code
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National Electrical CodeNational Electrical Code
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National Electrical CodeNational Electrical Code
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National Electrical CodeNational Electrical Code
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Electric Shock DrowningElectric Shock Drowning
NEC UpdateNEC Update
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Electric Shock DrowningElectric Shock Drowning
ABYC E-11NFPA 70 — NEC
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Marina Power
Shore Cord
NFPA 302NFPA 303
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Electric Shock DrowningElectric Shock Drowning
Typical Dock Electrical Distribution
MAIN FEEDER BRANCH(Pedestal)
R
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Electric Shock DrowningElectric Shock Drowning
Typical Dock Electrical Distribution
2011 / 2014 NEC
… or … … or …MAIN FEEDER BRANCH(Pedestal)
R100 mA 100 mA 100 mA
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Electric Shock DrowningElectric Shock Drowning
Typical Dock Electrical Distribution
2011 / 2014 NEC
MAIN FEEDER BRANCH(Pedestal)
R100 mA
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Electric Shock DrowningElectric Shock Drowning
Typical Dock Electrical Distribution
2011 / 2014 NEC
MAIN FEEDER BRANCH(Pedestal)
R30 mA
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Electric Shock DrowningElectric Shock Drowning
Typical Dock Electrical Distribution
2017 NEC
… and …
30 mA 30 mA
… and …MAIN FEEDER BRANCH(Pedestal)
R30 mA
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Electric Shock DrowningElectric Shock Drowning
Typical Dock Electrical Distribution
2017 NEC
30 mA 30 mA
… and …MAIN FEEDER BRANCH(Pedestal)
R30 mA
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Tentative Interim Agreement 1348
(TIA 1348)
Electric Shock DrowningElectric Shock Drowning
R tiR tiReaction Reaction to the to the
2017 NEC2017 NEC
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2017 NEC2017 NEC
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National Electrical CodeNational Electrical Code
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National Electrical CodeNational Electrical Code
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National Electrical CodeNational Electrical Code
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Electric Shock DrowningElectric Shock Drowning
Inspect Dock WiringInspect Dock Wiring
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Condition of Receptacles Condition of Receptacles
Circuit Breakers
Wiring and Connections
Electrical Ground Integrity
Circuit Breakers
Wiring and Connections
Electrical Ground Integrity
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g y
Line Voltage
g y
Line Voltage
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Test The BoatsTest The Boats
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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
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gg
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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)
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61 Failed Immediately
Cliff Norton, Bellingham Marine Industries, 2018
61 Failed Immediately
Cliff Norton, Bellingham Marine Industries, 2018
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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
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ground path (the only practical way when GFP
is installed)
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ESD Warning SignsESD Warning Signs
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National Electrical CodeNational Electrical Code
Warning Signs required stating
"WARNING - POTENTIAL SHOCK HAZARD - ELECTRICAL CURRENTS MAY BE PRESENT IN THE WATER."
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Required by
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the 2017 NEC
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ESD FliersESD Fliers
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Electric Shock DrowningElectric Shock Drowning
ELECTRIC SHOCK DROWNING PREVENTION ASSOCIATION
www.electricshockdrowning.org
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Electric Shock Drowning Resource Center
www.boatus.com/seaworthy/ESD.asp
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