30ma residual current device selection starts with the circuit role, the project requirement, and selected-model documentation. 30mA vs 10mA RCCB: Sensitivity Selection Questions for Distribution Panels helps panel builders organize those checks before a device is specified or an RFQ is issued. Sensitivity choices stay with the project team and the residual-current device documentation selected for the circuit.
Part 1. What does 30mA versus 10mA actually change?
The setting is the residual-current sensitivity to be reviewed, not a promise that one device is universally safer or suitable. A 10mA setting calls for a lower residual-current threshold than 30mA, so it demands a closer review of the circuit, the local installation rules, and expected leakage in normal operation.
Part 2. Which panel inputs belong in the sensitivity decision?
Start with the circuit schedule, single-line diagram, connected-load list, intended users, installation environment, and applicable project rules. These inputs establish whether the decision concerns supplementary personal protection, continuity of supply, or a local requirement that must be confirmed from the project documentation.
The following review table keeps assumptions out of the drawing and quotation stage:
| Check | Why the panel team needs it | Do not assume |
|—|—|—|
| Circuit role | Defines the protection or control question | A category image proves the installed duty |
| Selected-model documents | Confirm terminals, functions, and limits | A generic product family confirms every option |
| Project rules | Set the applicable design and acceptance context | One regional practice is a global default |
| Drawing revision | Keeps the panel and RFQ aligned | An earlier schematic still represents the build |
Part 3. Why can normal leakage affect availability?
Electronic equipment and filters can contribute leakage in normal service, while a 10mA setting leaves less margin before an unwanted trip. That does not justify replacing a required sensitivity with a less-sensitive device; it means the panel team should identify circuit grouping and leakage contributors before approving the protection arrangement.
Importante: Do not treat residual-current sensitivity as a universal safety upgrade; the required setting must follow the project design and selected-model instructions. (source — IEC webstore residual-current device standards discovery)
Part 4. How should the panel drawing separate protection decisions?
Keep the residual-current device, protective devices, neutral arrangement, loads, and any control circuits identifiable on the drawings. The drawing should make clear which conductors pass through the sensing path and which downstream circuits share the protective device; the selected product instructions and project design remain controlling.
Part 5. What should an RFQ say about a 30mA residual current device?
A useful RFQ identifies the circuit purpose, requested residual-current sensitivity, supply arrangement, load types, environmental context, governing project standard, drawings, and documentation required for the selected model. It should ask the supplier to confirm only the exact model evidence requested, rather than infer ratings or approvals from a category image.
A compact RFQ input list makes the supplier response easier to compare:
| Buyer should provide | Por qué importa | Common mistake |
|---|---|---|
| Current drawing set | Defines the circuit boundary | Sending a product name without a diagram |
| Required functions | Makes the request reviewable | Treating unverified options as standard |
| Contexto de instalación | Identifies project conditions to confirm | Assuming category copy is a project approval |
| Documentation request | Connects the RFQ to exact evidence | Accepting generic claims instead of model data |
| Send with quote | Makes supplier comparison auditable | Quoting without the requested evidence pack |
For broader context, review the 30ma residual current device product family and the related product line page.
Part 6. Which CHAC page is the appropriate product starting point?
For an early product-family discussion, use the published CQL14 residual-current device page together with the RCCB category. Neither page substitutes for a project design review or selected-model documentation; the final selection must be confirmed against the application and required evidence.
Recomendación de producto
Utilice el publicado relevant CHAC product page as a documented product route starting point for a product discussion only after the RFQ inputs are complete. OEM buyers who need branded packaging for residual-current devices can open the RCCB customization discussion. Similarity of plastic housings is not evidence that another residual-current device meets the sensitivity and sensing-path requirements on the drawing.
Part 7. Where does this 10mA/30mA comparison stop being enough?
This guide suits panel builders and buyers defining the questions around 10mA and 30mA sensitivity. It does not provide live-work instructions, local-code interpretation, coordination approval, or a claim that a listed CHAC product is compatible with a particular panel. Include a drawing review checkpoint so the sensing path and shared downstream circuits are visible before the RFQ is issued.
Fit Boundary: residual-current sensitivity guidance ends at RFQ preparation; it does not set installation approval or local-rule interpretation.
Related reading: a narrower, already-published CHAC article is linked for context, not as a replacement for this article’s decision scope.
Send the residual-current schedule, leakage notes, and requested model evidence to Contactar a CHAC Electric for a product-route discussion.
Preguntas frecuentes
What is the practical difference between 10mA and 30mA sensitivity?
They are different residual-current sensitivity settings. The lower setting requires a closer review of circuit leakage, the project requirement, and the consequences of an unwanted trip.
Does a 10mA setting automatically replace a 30mA setting?
No. The required sensitivity is set by the installation design and applicable project rules, not by a generic preference for the lowest number.
Can expected leakage be ignored during panel selection?
No. Normal-service leakage and circuit grouping should be reviewed because they can affect availability, especially where a lower sensitivity is specified.
Which drawings should a panel builder provide for an RCCB review?
Provide the single-line diagram, circuit schedule, neutral arrangement, load information, and the control or distribution drawing needed to understand the circuit boundary.
What should an RCCB RFQ request from the supplier?
Request the selected-model documentation, the intended sensitivity, circuit role, supply information, required project evidence, and the drawings that define the installation.
When should a designer confirm the final residual-current device?
Confirm it after the circuit inputs and project requirement are complete, and before the panel design is released for manufacture or installation.
