MCCB
MCCB meaning in Australian switchboard and protective-device records.
MCCB wording in switchboard records
MCCB means moulded case circuit breaker. In Australian records the term often appears in switchboard, feeder, larger load and protection contexts where the product data may include more than a simple abbreviation.
The term should stay tied to the actual device reference, settings source, frame or trip-unit information where the project record uses those details. AUWiring treats MCCB as a device term, not as a shortcut for device selection or a final switchboard decision.
Why MCCB is not just MCB wording
MCCB and MCB are related circuit-breaker terms, but they should not be merged when product data, settings or fault-duty review matter.
| Record context | Keep visible | Why it matters |
|---|---|---|
| Switchboard schedule | MCCB reference, feeder and downstream context | Shows which device row is being read |
| Settings record | setting source and product data | Avoids guessing from the acronym |
| Fault-duty review | breaking capacity and prospective current | Keeps interruption context separate from normal rating |
Settings and manufacturer data
MCCB records may depend on manufacturer data, trip-unit details, settings and project review. The glossary term does not infer those values and does not decide coordination, selectivity or product suitability.
If a record only says MCCB without the supporting product information, the next reviewer still needs the device data before using the value in protection calculations.
Using MCCB settings
Use the protection device terms table for abbreviation context. Use manufacturer-data guidance when MCCB product information controls the review, and use fault-current pages only when the device location and prospective current are known.
Source and review
Check the terminology source, review timing and Australian application before carrying this term into a project record.
| Item | Value |
|---|---|
| Source | AUWiring protection device terms table, short-circuit calculator wording and manufacturer-data guide content. |
| Source type | Australian terminology |
| Derivation basis | AUWiring Australian glossary term; no controlled protection tables are reproduced. |
| Last checked | 2026-07-13 |
| Review interval | Annual terminology review or sooner if protection device wording changes. |
| Review trigger | Update when protection device terms, short-circuit calculator or manufacturer-data guide wording changes. |
| Version used | T30-2026-07-13 |
| Australian application | Australia; Australian English protection terminology. |