Masthead29_Mar2014 G.pub - page 11

TheMasthead
I
t's longbeenknown that 16AWG is the smallestwire size
that canbeused inboats conforming toE-11. But this is
only onepieceof theoverall puzzle. Several "Exceptions"
follow this requirement that deserveattention. Exception#1
canbeusedwhereampacity and voltagedropallows for a
smaller size than16 suchas LED lighting circuits.
Exception1: 18AWG conductorsmay beused if included
withother conductors ina sheathanddonot extendmore
than30 inches (762mm) outside the sheath.
Theexceptionallows for onewire size smaller if contained in
a sheath. Sowhat does thatmean?Refer to thedefinitions:
Sheath - amaterial usedasa continuous protective cover-
ing, suchas overlappingelectrical tape, woven sleeving,
molded rubber,moldedplastic, loom, or flexible tubing,
aroundoneormore insulated conductors.
Bundling is themost common termand it canbedone ina
variety ofways including loomor by simply usingduplex
wire. The concern this requirement stems from isn't anam-
pacity issue, but rather amaterials strength issue. A lone18
AWGor smallerwiredoesn't have the vibrationor tug
strength toholdup to theoften violentmotions exhibited in
themarineenvironment. Butwhen you combine twoor
more, it does in factmaintain that needed strength. Sowhy
not allow for smaller than18AWG?Sure, a22AWGwould
safely handle theelectrical loads of an LED lighting circuit.
But somewhere, someone is going touse that circuit for
somethingelse... different lightingor drawingpower toa
newGPSunit. Itwouldbe tooeasy toexceed theampacity
of the circuit, soa linehad tobedrawn in the sandat some
point and18AWG is it.
Theother exceptions to theminimumwire sizeareequally
important but a littlemore self explanatory. They are:
2. 18AWG conductorsmay beusedas internal wiringon
panelboards.
3. Conductors that are totally insideanequipment enclo-
sure.
4. Conductors on circuits of less than50 volts havinga
current flowof less thanoneamp in communication
systems, electronic navigationequipment andelec-
tronic circuits.
5. Pigtails less than seven inches (178mm) usedaswir-
ingonpanelboards.
It pays to read theNotes andExceptions inany of ABYC's
standards, sodon't overlook themwhen youare researching
somethingnew (and sometimes something youarequite
familiarwith too).
MatthewWienold is the Technical StandardsSpecialistwith
ABYC. Contact himat
or (410) 990-
4460 x116.
MinimumWireSizeandLEDLighting
ByMattWeinold
March 2014 Page11
Early releaseof H-41, ReboardingMeans, Ladders, Hand-
holds, Rails and Lifelines July2014
Anearly releaseof the July2014publicationH-41 is now
availableonABYC’sWebSTIRonline standards access.
Technical changes include increasing the reboarding ladder
length from12 inches below thewater surface to22 inches
below thewater surface. Also, requirementswereadded for
cockpit coamingopeningdevices (gates, doors, etc.) towith-
standa400poundapplied from the inside the cockpitwith-
out failure toperform their intendedpurpose.
The compliancedate is set for July31, 2015.
The standard is availableon theABYCwebsiteat
Sailboat RiggingFocusGroup
TheABYC Technical Board is investigating thepossibility of
developingan informational report on sailboat riggingand
inspection. Weare currently looking for riggers andother
interestedparties toparticipate in the focus group todeter-
mine industryneed, interest, and currently available re-
sources. The focus groupwill beasked to completean
online survey and thenpossibly participate ina conference
call. If youare interested inparticipating, pleaseemail your
contact information toBriana
t
UpdatedH-41Standard - NewSail RiggingStandard?
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