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本帖最后由 nnren 于 2011-2-11 16:45 编辑 # Q' j5 [" X. d7 p! d
- ~9 {( N' r9 d6 G( Z" E. c想贴出来给大家看看。" N* u+ c5 U0 i1 L+ L& b% l
7 T G: b7 w4 g/ tSubject: Real Electrical Fire Example
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Basic facts of the case: *" r _0 `; r. F3 `; ~3 v' e
---Electrician received a work order to inverstigate why hall way lights wre not working in an underground pedestrican tunnel between two buildings
0 e. A$ J$ Q) f; 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.% A( T$ H# m. {
---Electrician entered the room and when he opened the panel door, observed a series of breakers that were open in tripped position.
/ ?: b1 H) Y& a+ ]0 ~& _---Electrician assumed since the breakers were in the same general area, they controlled the hallway lights.
$ k, @* d& u& W! B: b& M9 U: A---When the electrician closed the breakers, they immediately tripped again.1 h; P5 B2 G9 A, Z f! u
---The electrician again closed the breakers and this time they stayed closed.
( A) V3 K, Q$ R---The electrician left the mechanical room to investigate whether the lights had come on or not.2 P8 o- w5 p( V" P. x
---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.
1 ^ h& ^# w5 w$ w/ s+ Y: w; x---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.7 A! \3 r- G3 | I! ~/ B0 l
---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.
: T( B2 d6 K! Y; e; X---The local fire department was called and fire was extinguished., ^" i1 n. p: m+ \7 y# m5 d: u( C
---Damage was confined to the mechanical room.7 K$ I8 \$ [# D5 B2 K0 J" H* o
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Additional Information---Mechanical room contained steam lines, chilled water pumps, and electrical panels( l( `. T, N% F
---Room was kept under lock and key
, @* N" k9 l, z$ d---The electrical panel did not have circuit breaker labels.1 }, T1 {9 I" f" n' k' _5 [5 n
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Discuss: --- What went wrong with this assignment?: N+ e4 E# P, B* c, [
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答案等有些回应再贴吧。 |
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