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November 29, 2018 <br /> eillmmfp toof <br /> r �,x t� ti tw p $Ikeutml <br /> �8�� � ��11F f oto <br /> v <br /> no. <br /> P � 441* <br /> ht o mm 4j x E MO rems <br /> 1101 �- (JO ft) pit„trench <br /> Maas 1,Division 1 orZene 0 <br /> (e.g.,saw apace In oantalner) <br /> Class I,Waist'1 or Zola 1 <br /> PM Bass I,Division 2 or.aone 2 <br /> FIGURE M6 A Electrical Area Classificatkni far Claes I <br /> Liquid Operations Around Open Containers,Supply <br /> Containers,Waste Containera,SprayGun Cleaners,and <br /> Solvent Distillation Units.[3&:Figure 6.5.5.2] <br /> Paint transfer to application equipment (e.g. paint pumps and agitation pots), and <br /> equipment cleaning after painting, occurs in an area that can potentially extend a <br /> substantial distance from the aircraft. Drawing 45-003-E600-1 shows the stacker <br /> locations that were used to define reasonable locations that these transfers could <br /> occur. The attached drawings exceed that required in figure 516.4 in two primary <br /> ways, both to allow the boundary in the paint hangar to be simplified: <br /> 1. The Class I Division I area was extended vertically until it meets the <br /> horizontal plane defined in the paint application section. <br /> 2. The Class I Division II area was extended to 5 feet horizontally in lieu <br /> of 2 feet to make this transition region consistent throughout the paint <br /> hangar <br /> The net effect of these simplifications is the open container requirement defines <br /> the horizontal boundary parallel to the fuselage rather than the paint application <br /> requirement. <br /> In addition, paint is moved from an adjoining paint mix room out to the transfer <br /> locations, and to an adjacent rudder/elevator shop, along a predictable path. The <br /> top of the paint containers when moved on a cart is less than 5 feet above grade <br /> — as a result, the upper boundary of the Class I Division 1 zone is 8 feet above <br /> grade and the boundary of the Class I Division 2 zone is 10 feet above grade. <br /> The Class I Division 1 zone is 6 feet wide, and an additional 5 feet was defined <br /> for Class I Division 2. The hazardous rating along this path shown on Boeing <br /> drawing 45-03-E600-1 Rev A complies with figure 516.4. A symmetrical area <br /> was provided on the opposite side of the paint hangar to standardize electrical <br /> classification. <br /> =r Page4oflO <br />