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本帖最后由 nnren 于 2011-2-11 16:45 编辑
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想贴出来给大家看看。
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& L* P% ?6 w8 E7 B2 Y$ U. pSubject: Real Electrical Fire Example7 ^+ V7 E& k" z' ~3 @7 z
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Basic facts of the case: *
% `0 E- c! S8 j1 ~: A. D' R---Electrician received a work order to inverstigate why hall way lights wre not working in an underground pedestrican tunnel between two buildings) {4 V! z7 @% @& P
---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 c) v( r/ B% D+ f" Y% {- M4 O, r
---Electrician entered the room and when he opened the panel door, observed a series of breakers that were open in tripped position.* ^% ]6 k/ I3 o% \( U; [7 z" p; Y
---Electrician assumed since the breakers were in the same general area, they controlled the hallway lights.: R! D$ G9 @2 X4 g5 A% m8 ]/ t
---When the electrician closed the breakers, they immediately tripped again.
8 j* I% J# b7 k5 K# G---The electrician again closed the breakers and this time they stayed closed.
& R# Q# d; l. `+ ~& M---The electrician left the mechanical room to investigate whether the lights had come on or not.
5 d- U. _: @8 m \, Z! s- |---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.
9 |7 c* F5 W! N0 I) s# v* a---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.
' |: J( e/ Z# {5 {---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.
# [: e. z, ?3 B0 M---The local fire department was called and fire was extinguished.
" i3 X5 I; o. w, q---Damage was confined to the mechanical room.; G e6 A/ D) H( U
1 L O* a+ O, z$ `3 oAdditional Information---Mechanical room contained steam lines, chilled water pumps, and electrical panels8 p3 m+ F, G" o$ V
---Room was kept under lock and key% y( [- B- F! _3 B6 g! p$ d
---The electrical panel did not have circuit breaker labels.! {$ T5 V" E2 n( e9 G
+ w! j4 R. V0 y6 D. HDiscuss: --- What went wrong with this assignment?
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" s' v( ]0 H0 \1 v答案等有些回应再贴吧。 |
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