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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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3 m8 W3 _! E0 ?9 t0 r5 x$ jSubject: Real Electrical Fire Example
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2 R4 N* `/ b! `/ `/ q+ rBasic facts of the case: *
' m0 P9 H8 H$ [, f( r---Electrician received a work order to inverstigate why hall way lights wre not working in an underground pedestrican tunnel between two buildings
3 P# |2 A7 _: e' m1 O$ `: x3 Z---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.
6 A! D @1 W- ^ P0 _6 p* e" D& a---Electrician entered the room and when he opened the panel door, observed a series of breakers that were open in tripped position.
- b6 Q( x8 b V# X& x---Electrician assumed since the breakers were in the same general area, they controlled the hallway lights., M' S1 i* q5 X7 a# B- t" q. y, X" i
---When the electrician closed the breakers, they immediately tripped again.+ ^2 \) k4 ]2 T h& Z/ O4 S
---The electrician again closed the breakers and this time they stayed closed.
" x& \" ~- p, u# I1 x C---The electrician left the mechanical room to investigate whether the lights had come on or not.9 Y2 n6 b3 T+ H9 @
---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.
8 T4 {; j# _& `) e! t" 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.; [. i, l, I* O* r1 d
---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.
' j6 y P0 K" E---The local fire department was called and fire was extinguished.
! U- x0 x0 y/ c* ?---Damage was confined to the mechanical room.
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# N4 Q% X7 m! f% T4 [% C! mAdditional Information---Mechanical room contained steam lines, chilled water pumps, and electrical panels$ P: I4 G, s4 m
---Room was kept under lock and key8 e, {" Y7 M9 z8 |" l& i
---The electrical panel did not have circuit breaker labels.6 O L" s7 L9 F# x% M3 D& n
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Discuss: --- What went wrong with this assignment?
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3 |2 V T2 z" D( W5 M答案等有些回应再贴吧。 |
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