Measurements of four transport coefficients are reported for a superconducting Nd_1.86Ce_0.14CuO_4-δ single crystal. Namely the normal state temperature dependencies of the resisitivity (ρ), Hall coefficient (R_H), thermal conductivity (κ) and Righi-Leduc coefficient (S_RL) have been investigated. We have noticed that the Hall coefficient changes its sign twice (R_H is positive below 50 K and above 250 K, and negative between these temperatures), whereas S_RL remains positive in the whole temperature range. Disagreement between signs of S_RL and R_H, strongly suggest that both, n-type and p-type, charge carriers are present in the material. We conclude that hole-like subsystem dominates the heat transport, and seems to obey the Wiedemann-Franz law.

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