---
title: "readAttributeRmsVoltageMaxPhaseB(with:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrclusterelectricalmeasurement/readattributermsvoltagemaxphaseb(with:)"
---

# readAttributeRmsVoltageMaxPhaseB(with:)

## Declaration

```swift
func readAttributeRmsVoltageMaxPhaseB(with params: MTRReadParams?) -> [String : Any]?
```