RCCB for Water Heater
|
|
 Nov 12 2024, 10:06 AM
Return to original view | IPv6 | Post
#1
|
 
Senior Member
2,198 posts Joined: Jan 2003 
|
QUOTE(Zot @ Nov 11 2024, 04:03 PM) As for ST guideline: Need to follow cable size. Not socket qty MCB 16A for 1x 13A socket MCB 20A for 2x 13A socket MCB 32A for 4x 13A socket MCB 32A for 6x 13A socket in ring configuration.  Avoid ring if possible. If the ring break, mcb won't trip even when overloaded I would love to see the St publication. |
|
|
|
|
|
Nov 12 2024, 10:25 AM
Return to original view | IPv6 | Post
#2
|
|
Senior Member
2,198 posts Joined: Jan 2003
|
QUOTE(Zot @ Nov 12 2024, 10:18 AM) Cable size is already defined for lighting and socket. Why ring will not trip if overloaded? The current to MCB is still total of two separated string of loads. Note that each socket is still protected by 13A fuse. Ring uses loop. If the loop is brokenThe only become 1 wire feeding the socket instead of two. |
|
|
Nov 12 2024, 11:29 AM
Return to original view | Post
#3
|
|
Senior Member
2,198 posts Joined: Jan 2003
|
QUOTE(Zot @ Nov 12 2024, 10:40 AM) Yes, but the wire is still the 4mm wire for the socket as standard  https://www.st.gov.my/contents/publications...uildings%20.pdf page18 here say ring use 2.5mm2 and mcb 32amps. if ring use 4mm2, then no issue. |
|
|
Nov 12 2024, 06:16 PM
Return to original view | Post
#4
|
|
Senior Member
2,198 posts Joined: Jan 2003
|
Avoid ring as much as possible It's designed during WW2 as copper shortage stormer.lyn liked this post
|
| Change to: |  0.0198sec
 0.62
 7 queries
 GZIP Disabled
Time is now: 28th November 2025 - 06:31 AM |
Quote