There is almost always an alarm system linked to a 24-hour communication centre which can summon help in an emergency and usually a scheme manager (warden) ‚ who may live on site.
Bydd bron bob amser system larwm sydd wedi'i chysylltu â chanolfan gyfathrebu 24 awr a all anfon help mewn argyfwng ac, fel arfer, bydd rheolwr cynllun (warden) a fydd o bosibl yn byw ar y safle.