iOS Appending to arrays in Objects

@class HomeControlAppliance;

@interface HomeControlGroup : NSObject {
	NSString		*groupName;
	NSInteger		groupNumber;
	NSMutableArray	*homeControlAppliances;
}
@property (nonatomic,retain) NSString	*groupName;
@property (nonatomic,assign) NSInteger	groupNumber;
@property (nonatomic,retain) NSMutableArray	*homeControlAppliances;

- (id) initGroup: (NSString *) newName  groupNumber: (NSInteger)newNumber;
- (void) addHomeControlAppliance: (HomeControlAppliance *) newAppliance;

@end

- (id) initGroup: (NSString *) newName  groupNumber: (NSInteger)newNumber {
	self = [super init];
	if (self != nil) {
		self.groupName =  newName;
		self.groupNumber = newNumber;
		[self.homeControlAppliances initWithCapacity: 10];
	}
	return self;
}

- (void) addHomeControlAppliance: (HomeControlAppliance *) newAppliance {
	[self.homeControlAppliances addObject: newAppliance];
}

- (id) initGroup: (NSString *) newName  groupNumber: (NSInteger)newNumber {
	self = [super init];
	if (self != nil) {
		self.groupName =  newName;
		self.groupNumber = newNumber;
		[COLOR="Red"]self.homeControlAppliances = [[NSMutableArray alloc] initWithCapacity: 10];[/COLOR]
	}
	return self;
}