The CNC NV821884 Residual Current Breaker with Over-Current 2P 20A C-Curve 30mA 6kA is compared against several similar residual current circuit breakers from CNC. All reviewed models share a common purpose—ensuring electrical safety in residential and commercial circuits, protecting against overloads, short circuits, and earth leakage faults—along with identical sensitivity (30mA), breaking capacity (6kA), and C tripping characteristics. The main practical differences lie in the number of poles (2 or 4 poles for single-phase or three-phase systems) and the rated current (ranging from 20A to 63A), which determines the allowable electrical load.
⚙️ The technical specifications comparison table below contrasts parameters such as the number of poles, rated current, tripping curve, residual operating current, breaking capacity, and the practical application of each model.
| Parameter | CNC NV821884 | CNC NV821938 | CNC NV821907 | CNC NV821891 | CNC NV821969 | CNC NV821914 | Practical Conclusion |
|---|
| Number of Poles | 2P | 4P | 2P | 2P | 4-Pole | 2-Pole | Determines the type of connected network: 2 poles suit single-phase lines, while 4 poles fit three-phase systems with a neutral. |
| Rated Current | 20A | 20A | 32A | 25A | 63A | 63A | Affects the maximum allowable load of connected appliances. The 20A model is optimal for standard socket or lighting groups of moderate power. |
| Tripping Curve | C-Curve | C-Curve | C Curve | C-Curve | C-Curve | C-Curve | All devices feature a universal C curve suitable for most residential and commercial loads with moderate inrush currents. |
| Residual Current | 30mA | 30mA | 30mA | 30mA | 30mA | 30mA | Provides the same level of personal protection against electric shock across all models. |
| Breaking Capacity | 6kA | 6kA | 6kA | 6kA | 6kA | 6kA | Identical capability to safely interrupt short-circuit currents. |
◎ The suitability table below evaluates how well the devices match various usage scenarios and buyer needs to help select the most appropriate model for specific installation tasks.
| Use Case | Recommended Product | Why |
|---|
| Standard single-phase 20A socket circuit protection | CNC NV821884 Residual Current Breaker with Over-Current 2P 20A C-Curve 30mA 6kA | Ideally matches standard single-phase lines of moderate power in terms of rated current and pole count. |
| Three-phase line protection up to 20A load | CNC NV821938 Residual Current Breaker with Over-Current 4P 20A C-Curve 30mA 6kA | Requires a four-pole configuration to operate in three-phase networks with similar current limits. |
| Connecting higher power consumption lines (up to 32A, 2-pole) | CNC NV821907 Residual Current Breaker with Over-Current 2P 32A C Curve 30mA 6kA | Offers a higher allowable current load for demanding single-phase consumers compared to the 20A version. |
| High-power three-phase distribution nodes (63A) | CNC NV821969 Residual Current Breaker with Over-Current 4-Pole 63A C-Curve 30mA 6kA | Designed to handle high current loads in three-phase distribution systems for residential or commercial properties. |
Choosing between the CNC NV821884 Residual Current Breaker with Over-Current 2P 20A C-Curve 30mA 6kA and alternative models depends entirely on your electrical system configuration and required current load. The CNC NV821884 model is optimal for standard two-pole single-phase circuits with a maximum current of 20A, such as regular socket groups. If you need to switch three-phase power or protect circuits with higher energy consumption, you should choose the corresponding alternative model from the lineup that matches your required rating and pole count.
