You won’t get in trouble if you call 911 about suicide, but if they think it’s not urgent they may point you to other resources rather than dispatch emergency services. The suicide hotline provides non-emergency resources but can’t emergency dispatch.
Perhaps in the future, more 911 centers will be expanded to include non-emergency suicide resources, but most or all don’t have that right now.
https://en.wikipedia.org/wiki/112_(emergency_telephone_numbe...
these days we accept 111 911 999 112 as synonyms
(2) Emergency dispatch may automatically dispatch police/fire/EMS. That may be counterproductive to (and discourage calls for) some other events that a ready access number is desired for.
(2) is this done in practice or just hypothetical?
That varies from PSAP (Public Safety Answering Point) to PSAP. Local policy dictates what the first thing said to the caller is. And while I believe it is the case that most PSAP's use "where is your emergency" as their first question these days, some still use "what is your emergency" instead. This is one of those things that people who work in public safety (especially dispatchers) love to have religious arguments about.
And just to go back to the point about emergency / non-emergency calls: people call 911 for all sorts of shit that isn't an emergency. And while I've been gone from dispatching for a while, from what I understand, this problem has only gotten worse over the years. Unfortunately 911 has gone from "the number I call if somebody is dying or something is on fire" to "the number I call if there is anything going on that I don't understand or don't like, and want to demand that Somebody Needs To Do Something About It." :-(
Source: former 911 dispatcher and firefighter, and have called 911 a handful of times over the years.
If the situation you are in means that you don’t have time, ability, means, or mental capacity to Google for the right number then the right number to use is 999.
It’s a self-solving problem.