21-09-2012, 11:28 PM
Mr. Doyle,
I answered this only to find that my answer disappeared into the ether. Once again...
The cause of the electrical problems UPSTREAM of the plane crash likely resulted from the 2 - 13.8kv electrical risers (a cables) from the basement switch gear being severed and shorting out. WTC 1 had 8 - 13.8kv power feeds to the 4 mech floors the tower The circuit protection for very larger power lines is notoriously slow and this can result in voltage spikes or shorts effecting equipment up stream which in the case of WTC 1 would be in the sub basement where the feed from the Con Ed sub station from WTC 7 came into WTC 1.
Electrical failures can often cascade... as we've seen from blackouts which took out the entire NE sector of the nation power grid in a series of cascading failures.
The short of the riser in WTC 1 may have caused the explosions Rodriguez heard in WTC 1 and the electrical problems in WTC 7 which also lost power before 10am. The windowless OEM was running on back up power by the time Jennings and Hess headed to the stairs before 10am.
There have been sub station explosions in NYC (Queens) and there were power equipment which exploded in the sub basement mech floors in WTC 1 in 1992... not related to the 1993 truck bomb.
Large transformer run very hot and require cooling via radiators which are often filled with flammable oil which can release explosive gas. Newer models have insulation liquid which does not catch fire or explode... but who knows what was in the equipment in the WTC built back in the 60s, 70s and 80s.
There were many explosions reported at the WTC on 9/11 and there were many *things* in those buildings which could explode from shorts, voltage spikes, and fires. But the explosion sounds could also be bombs. It's hard to be certain what they were, but it IS certain that things OTHER than bombs would explode in building systems under such stress.
The important thing to understand is how cascading failures progress and then they exhibit a rapid onset and catastrophic system failure. And we say such types of failures in all three towers.
I answered this only to find that my answer disappeared into the ether. Once again...
The cause of the electrical problems UPSTREAM of the plane crash likely resulted from the 2 - 13.8kv electrical risers (a cables) from the basement switch gear being severed and shorting out. WTC 1 had 8 - 13.8kv power feeds to the 4 mech floors the tower The circuit protection for very larger power lines is notoriously slow and this can result in voltage spikes or shorts effecting equipment up stream which in the case of WTC 1 would be in the sub basement where the feed from the Con Ed sub station from WTC 7 came into WTC 1.
Electrical failures can often cascade... as we've seen from blackouts which took out the entire NE sector of the nation power grid in a series of cascading failures.
The short of the riser in WTC 1 may have caused the explosions Rodriguez heard in WTC 1 and the electrical problems in WTC 7 which also lost power before 10am. The windowless OEM was running on back up power by the time Jennings and Hess headed to the stairs before 10am.
There have been sub station explosions in NYC (Queens) and there were power equipment which exploded in the sub basement mech floors in WTC 1 in 1992... not related to the 1993 truck bomb.
Large transformer run very hot and require cooling via radiators which are often filled with flammable oil which can release explosive gas. Newer models have insulation liquid which does not catch fire or explode... but who knows what was in the equipment in the WTC built back in the 60s, 70s and 80s.
There were many explosions reported at the WTC on 9/11 and there were many *things* in those buildings which could explode from shorts, voltage spikes, and fires. But the explosion sounds could also be bombs. It's hard to be certain what they were, but it IS certain that things OTHER than bombs would explode in building systems under such stress.
The important thing to understand is how cascading failures progress and then they exhibit a rapid onset and catastrophic system failure. And we say such types of failures in all three towers.