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<font face="Times New Roman, Times, serif"><i><b>The following
message is being sent on behalf of Henry Robertson,
Engineering DSO:</b></i><br>
<br>
<big><big><b><font face="Arial Black">Just a reminder about the
use of GFCI devices:</font><br>
</b></big></big></font><b style="mso-bidi-font-weight:normal"><span
style="font-size:18.0pt"><font color="#ff0000"><b><i><br>
(GFCI circuits are always required in JLab tunnel
environments and most other concrete/slab structures!)<br>
</i></b></font><br>
ES&H Manual<br>
6200 Appendix T4<o:p></o:p></span></b> <b
style="mso-bidi-font-weight:normal"><span style="font-size:18.0pt">-
General Electrical Safety Guidelines</span></b><br>
<br>
<font face="Times New Roman, Times, serif"><b
style="mso-bidi-font-weight: normal"><span
style="font-family:"Times New Roman
Bold";mso-fareast-font-family: "Times New Roman
Bold";mso-bidi-font-family:"Times New Roman
Bold""><span style="mso-list:Ignore">4.2<span
style="font:7.0pt "Times New Roman"">
</span></span></span></b><b><a moz-do-not-send="true"
href="http://www.jlab.org/ehs/ehsmanual/Glossary.htm#GFCIDef">Ground-Fault
Circuit
Interrupter</a> (GFCI)</b> </font>
<p class="MsoNormal" style="margin-left:1.0in;text-align:left;
mso-layout-grid-align:none;text-autospace:none" align="left">GFCI
is a device intended for the protection of personnel.<span
style="mso-spacerun:yes"> </span>It
de-energize a circuit, or portion thereof, within an established
period of time when current to ground exceeds approximately 6mA.<span
style="mso-bidi-font-family: Melior"><span
style="mso-spacerun:yes"> </span>A GFCI </span>is required:<span
style="mso-bidi-font-family:Melior"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:1.5in;text-indent:-.25in;mso-list:l12 level1
lfo26"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
style="mso-list:Ignore">·<span style="font:7.0pt "Times
New Roman""> </span></span></span>Per the
National Electrical Code.<span style="mso-spacerun:yes"> </span>They
are installed in all new construction and renovation projects as
required.</p>
<p class="MsoNormal"
style="margin-left:1.5in;text-indent:-.25in;mso-list:l12 level1
lfo26"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
style="mso-list:Ignore">·<span style="font:7.0pt "Times
New Roman""> </span></span></span>Where 125-volt
single-phase; and 15- and 20-ampere receptacles are installed
(i.e., bathrooms, kitchens, rooftops, outdoors, and within six
feet of the outside edge of a sink).</p>
<p class="MsoNormal"
style="margin-left:1.5in;text-indent:-.25in;mso-list:l12 level1
lfo26"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
style="mso-list:Ignore">·<span style="font:7.0pt "Times
New Roman""> </span></span></span><span
style="mso-bidi-font-family:Melior">For
all receptacle outlets (including extension cords, and temporary
wiring used to supply power to equipment during construction,
remodeling, maintenance, repair, or demolition of buildings,
structures, or equipment, or similar activities.)</span></p>
<p class="MsoNormal"
style="margin-left:1.5in;text-indent:-.25in;mso-list:l12 level1
lfo26"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
style="mso-list:Ignore">·<span style="font:7.0pt "Times
New Roman""> </span></span></span>For use with:</p>
<p class="MsoNormal"
style="margin-left:2.0in;text-indent:-.25in;mso-list:l12 level2
lfo26"><span style="font-family:"Courier
New";mso-fareast-font-family:"Courier New""><span
style="mso-list:Ignore">o<span style="font:7.0pt "Times
New Roman""> </span></span></span>Cord-and-plugged
vending machines (installed after 1/1/2005).</p>
<p class="MsoNormal"
style="margin-left:2.0in;text-indent:-.25in;mso-list:l12 level2
lfo26"><span style="font-family:"Courier
New";mso-fareast-font-family:"Courier New""><span
style="mso-list:Ignore">o<span style="font:7.0pt "Times
New Roman""> </span></span></span>Electric drinking
fountains (installed after 1/1/2008).</p>
<p class="MsoNormal"
style="margin-left:2.0in;text-indent:-.25in;mso-list:l12 level2
lfo26"><span style="font-family:"Courier
New";mso-fareast-font-family:"Courier New""><span
style="mso-list:Ignore">o<span style="font:7.0pt "Times
New Roman""> </span></span></span>Portable
generators – for all 125-volt single-phase 15-, 20-, and 30-ampere
receptacles that are in use by personnel.</p>
<p class="MsoNormal"
style="margin-left:1.5in;text-indent:-.25in;mso-list:l6 level1
lfo28"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
style="mso-list:Ignore">·<span style="font:7.0pt "Times
New Roman""> </span></span></span>When supplying
temporary power, with the use of extension cords, in a damp or wet
location. <br>
<br>
</p>
<p class="MsoNormal"
style="margin-left:1.5in;text-indent:-.25in;mso-list:l6 level1
lfo28"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
style="mso-list:Ignore">·<span style="font:7.0pt "Times
New Roman""> </span></span></span>When supplying
temporary power for Jefferson Lab sponsored events – for all
125-volt single-phase 15-, 20-, and 30-ampere receptacles that are
in use by personnel.</p>
<p class="MsoNormal"
style="margin-left:1.5in;text-indent:-.5in;page-break-after:
avoid;mso-list:l19 level3 lfo2;tab-stops:list 1.0in"><o:p> </o:p><b
style="mso-bidi-font-weight:normal"><span
style="font-family:"Times New Roman Bold";
mso-fareast-font-family:"Times New Roman
Bold";mso-bidi-font-family:"Times New Roman
Bold""><span style="mso-list:Ignore">4.2.1<span
style="font:7.0pt "Times New Roman""> </span></span></span></b><b
style="mso-bidi-font-weight:normal">Testing <span
style="mso-bidi-font-weight:bold">GFCI</span></b></p>
<p class="MsoNormal"
style="margin-left:1.5in;page-break-after:avoid"><span
style="mso-bidi-font-weight:bold">Jefferson Lab recommends that
GFCI receptacles be tested in accordance with manufacturer’s
recommendations, periodically, and before using a device after
an extended period of time.</span></p>
<p class="MsoListParagraph"
style="margin-left:1.5in;text-indent:-.5in;
page-break-after:avoid;mso-list:l19 level3 lfo2;tab-stops:list
1.0in"><b style="mso-bidi-font-weight:normal"><span
style="font-family:"Times New Roman Bold";
mso-fareast-font-family:"Times New Roman
Bold";mso-bidi-font-family:"Times New Roman
Bold""><span style="mso-list:Ignore">4.2.2<span
style="font:7.0pt "Times New Roman""> </span></span></span></b><b>Types
of GFCIs</b></p>
<p class="MsoListParagraph"
style="margin-left:2.25in;text-indent:-.75in;
page-break-after:avoid;mso-list:l19 level4 lfo2;tab-stops:list
2.25in"><b style="mso-bidi-font-weight:normal"><span
style="mso-list:Ignore">4.2.2.1<span style="font:7.0pt
"Times New Roman""> </span></span></b><b
style="mso-bidi-font-weight:normal">Receptacle:</b><span
style="mso-spacerun:yes"> </span>A GFCI receptacle is used in
place of a standard outlet (see Figure 1.<span
style="mso-spacerun:yes"> </span>GFCI Receptacle).<span
style="mso-spacerun:yes"> </span>These are generally found
near water sources (e.g., kitchens, bathrooms, etc.).</p>
<p class="MsoListParagraph"
style="margin-left:0in;text-align:center; page-break-after:avoid"
align="center"><span class="GramE"><b>Figure 1.</b></span><b><span
style="mso-spacerun:yes"> </span>GFCI Receptacle</b></p>
<p class="MsoListParagraph"
style="margin-left:0in;text-align:center; page-break-after:avoid"
align="center"><span style="mso-no-proof:yes"><img
src="cid:part2.00000604.01040102@jlab.org" alt="gfci
receptacle1" v:shapes="Picture_x0020_2" height="122"
width="123" border="0"><img
src="cid:part3.07080501.08010506@jlab.org" alt="gfci
receptacle2" v:shapes="Picture_x0020_3" height="121"
width="121" border="0"></span><o:p> </o:p> </p>
<p class="MsoListParagraph"
style="margin-left:2.25in;text-indent:-.75in; mso-list:l19 level4
lfo2;tab-stops:list 2.25in"><b style="mso-bidi-font-weight:normal"><span
style="mso-list:Ignore">4.2.2.2<span style="font:7.0pt
"Times New Roman""> </span></span></b><b
style="mso-bidi-font-weight:normal">Portable:</b><span
style="mso-spacerun:yes"> </span>A portable GFCI is used to
provide temporary power from an unprotected outlet.<span
style="mso-spacerun:yes"> </span>They are tested prior to each
use (see Figure 2.<span style="mso-spacerun:yes"> </span>Portable
GFCIs).<o:p> </o:p> </p>
<p class="MsoListParagraph"
style="margin-left:0in;text-align:center; page-break-after:avoid"
align="center"><span class="GramE"><b
style="mso-bidi-font-weight:normal">Figure 2.</b></span><b
style="mso-bidi-font-weight:normal"><span
style="mso-spacerun:yes"> </span>Portable GFCIs<o:p></o:p></b></p>
<p class="MsoListParagraph"
style="margin-left:0in;text-align:center; page-break-after:avoid"
align="center"><span style="mso-no-proof:yes"><img
src="cid:part4.02030203.08090009@jlab.org" alt="Portable GFCI"
v:shapes="Picture_x0020_4" height="127" width="297" border="0"></span><o:p> </o:p>
</p>
<p class="MsoListParagraph"
style="margin-left:2.25in;text-indent:-.75in; mso-list:l19 level4
lfo2;tab-stops:list 2.25in"><b style="mso-bidi-font-weight:normal"><span
style="mso-list:Ignore">4.2.2.3<span style="font:7.0pt
"Times New Roman""> </span></span></b><b
style="mso-bidi-font-weight:normal">Circuit Breaker:</b><span
style="mso-spacerun:yes"> </span>A GFCI circuit breaker
controls an entire circuit on the main panel board.<span
style="mso-spacerun:yes"> </span>In the event of a ground
fault, short circuit, or overload the breaker trips and shuts off
electricity to circuit.<span style="mso-spacerun:yes"> </span>Only
those persons who have been trained by a qualified electrical
worker are authorized to reset GFCI circuit breakers.<span
style="mso-spacerun:yes"> </span>Contact Facilities Management
(x7400) for assistance if electricity is interrupted to your work
area.</p>
<font face="Times New Roman, Times, serif"><br>
</font>
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