Military and Federal facilities are not under the NEC for the most part, but only guided by industry standards - depending on contract. (This one not being 'standard' for this country....) You also don't mention the insulation - they might be using silicone - which has a much higher temp rating.
The US military has adopted the NEC for facilities in lieu of older MIL-SPECs and other codes that are just easier to use existing industry standards for. Anything built on a US base *should* be conforming to NEC and a number of other MIL-HDBKs that often exceed NEC requirements. We have much wider authority for deviation then in the civilian sector, though, as a single entity is generally responsible for funding, building and approving a project and isn't always as heavy-handed as a city inspector when it comes to failing things for non-compliance!
