There is a cap of 100 for NOC 8252, since it's considered only moderately in-demand occupation, but I really don't think any of the NOCs is in any danger of meeting the quota any time soon (unlike FSWP).
And jotgrewal mentioned, your brother most likely will need an arranged employment from some Canadian employer(s). The only way to bypass LMO requirement is by obtaining "a certificate of qualification in that skilled trade issued by a provincial or territorial body", though, according to the CIC website, "you will likely have to go to the province or territory to be assessed".
http://www.cic.gc.ca/english/immigrate/trades/apply-who.asp
I'm really interested in how this stream progresses, but there seems to be a very limited interest in Federal Skilled Trades Program on this forum.