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本帖最后由 nnren 于 2011-2-11 16:45 编辑
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# ]/ U1 r3 b. j想贴出来给大家看看。' S) Y2 b( n* Z1 U8 G' l/ G; W8 A! G
3 g+ Z- O9 p5 z- @8 m2 b) J3 X5 dSubject: Real Electrical Fire Example
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" \8 K( ~5 s$ ~) V6 s5 Q3 d1 DBasic facts of the case: *
4 k3 I9 ~. G& I, L---Electrician received a work order to inverstigate why hall way lights wre not working in an underground pedestrican tunnel between two buildings
% Y5 `5 w! |% }8 X+ C. g1 J6 I---Electrician went alone to investigate an electrical panel in a mechanical room where he thought the breakers were located. Note: the mechanical room is located in the same underground pedestrian hallway.: ]3 g- b+ _& k! f/ G/ p: @# t% i
---Electrician entered the room and when he opened the panel door, observed a series of breakers that were open in tripped position.! M9 t x t1 o& I( ?7 L
---Electrician assumed since the breakers were in the same general area, they controlled the hallway lights.& D- ^& {1 R5 y2 G! z f4 t. i. ]
---When the electrician closed the breakers, they immediately tripped again.$ P, H) F* h9 D' g+ E
---The electrician again closed the breakers and this time they stayed closed.
9 i ]: U1 z! Y& a/ b---The electrician left the mechanical room to investigate whether the lights had come on or not.7 e7 I; d- k% n0 A4 ]8 {! D# }2 k, h
---The hall lights had not come on , so the electrician assumed there was another electrical panel for the hall lights, and went to maintenance to find a print.
! p1 `) U7 G0 k---Sometimes later, as a security guard was passing the door that led to the mechanical room, the observed smoke coming from the electrical box and immediately called for an emergency.
- C2 u' ]$ G1 E/ n& p- Y---The underground pedestrian hallway was located above one of the office buildings, and therefore the entire office building had to be evacuated because of the fire and smoke.
$ V$ ?7 A [& }- M9 Z8 x---The local fire department was called and fire was extinguished.- }% J# c* [6 K
---Damage was confined to the mechanical room.4 K! C. ?' e! z' g% D' p
3 `7 P' Q) ~$ k& o5 [0 v, m" g' QAdditional Information---Mechanical room contained steam lines, chilled water pumps, and electrical panels; m( R: P( X7 i0 O1 Q* a: {
---Room was kept under lock and key- ~4 s o) o& p/ I4 |' x$ b4 c0 F; h
---The electrical panel did not have circuit breaker labels.$ k# ~( p" S0 k/ B2 h
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Discuss: --- What went wrong with this assignment?
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8 V+ s9 P: s$ G7 b# y: M答案等有些回应再贴吧。 |
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