A holder for a current sensor having separable portions with inner surfaces forming an opening and opposing outer surfaces having a groove to accommodate a current sensing coil. The holder includes flexible members on the portions and extending toward the opening such that the flexible members can hold a power cable substantially centered within the opening and concentric with the current sensing coil. The portions are joined together with a hinge pivotally mounted between them at one end and a releasable clasp joining them together at another end, providing for ease of installation around the power cable by hand and without requiring tools or additional fasteners.