Rack rails on network equipment

Sat Sep 25 02:58:35 UTC 2021

> On Sep 24, 2021, at 3:35 PM, Niels Bakker <niels=nanog at bakker.net> wrote:
> 
> * cma at cmadams.net (Chris Adams) [Sat 25 Sep 2021, 00:17 CEST]:
>> Which - why do I have to order different part numbers for back to front airflow?  It's just a fan, can't it be made reversible?  Seems like that would be cheaper than stocking alternate part numbers.
> 
> The fan is inside the power supply right next to the high-voltage capacitors. You shouldn't be near that without proper training.

Meh… Turn off power supply input switch, open chassis carefully, apply high-wattage 1Ω resistor across capacitor terminals for 10 seconds.

There isn’t going to be any high voltage left after that.

Owen

> 
> 
> 	-- Niels.