An employer shall indemnify the employer’s employee, except as prescribed in section 34-02-02, for all that the employee necessarily expends or loses in direct consequence of the discharge of the employee’s duties as such or of the employee’s obedience to the directions of the employer even though such directions were unlawful, unless the employee at the time of obeying such directions believed them to be unlawful. The obligation to indemnify does not include expenses incurred to purchase or rent tools of a trade or any other equipment that is also used by the employee outside the scope of employment.