So the trolley tracks can't host Mexican Double stack at 21' because of risk of arc with the wire, so if contact wire were 23' minimum, then the FRA-FTA-CPUC would allow revenue double stack and Trilevel autorack traffic under wire?




Dr Zarkoff Wrote:
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> True, but 1) overhead wire clearance requirements
> have generally increased since the NEC was
> electrified (100 years ago), and 2) the NEC south
> of New Haven is only 11kv, while the CAHSR will be
> 25kv. I believe that 21-23 foot clearance is
> pretty much a nationwide standard (south of NH,
> the NEC is grandfathered, no retrofitting
> required). GO 95 allows the SF Muni to have 17
> foot wire everywhere because its entire system is
> captive (i.e. no possibility of freight cars at
> all). SMDTS, on the other hand, has freight
> service, so it has the 21 foot wire, particularly
> where the freight operates.